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gamemodes/ixhl2rp/plugins/phone/cl_hooks.lua

@@ -0,0 +1,141 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+local PLUGIN = PLUGIN
+PLUGIN.targetedLandlineEndpointID = nil
+PLUGIN.targetedLandlinePBX = nil
+PLUGIN.targetedLandlineExt = nil
+PLUGIN.targetedLandlineName = nil
+
+do
+	surface.CreateFont("phoneMonoDebug", {
+		font = "Consolas",
+		size = 16,
+		extended = true,
+		weight = 1200
+	})
+end
+
+function PLUGIN:InitializedPlugins()
+	local color = Color(255, 0, 255)
+	local function drawConnectorESP(client, entity, x, y, factor)
+		ix.util.DrawText(
+			"Landline Phone",
+			x,
+			y - math.max(10, 32 * factor),
+			color,
+			TEXT_ALIGN_CENTER,
+			TEXT_ALIGN_CENTER,
+			nil,
+			math.max(255 * factor, 80)
+		)
+	end
+
+	ix.observer:RegisterESPType("landline_phone", drawConnectorESP, "Landline Phone")
+end
+
+net.Receive("EnterLandlineDial", function()
+	PLUGIN.targetedLandlineEndpointID = net.ReadInt(15)
+	PLUGIN.targetedLandlinePBX = net.ReadInt(5)
+	PLUGIN.targetedLandlineExt = net.ReadInt(11)
+	PLUGIN.targetedLandlineName = net.ReadString()
+	PLUGIN.landlineEntIdx = net.ReadInt(17)
+
+	if (PLUGIN.panel) then
+		LocalPlayer():Notify("Obecnie używasz telefonu!")
+	else
+		vgui.Create("ixLandlineDial")
+	end
+end)
+
+net.Receive("ixConnectedCallStatusChange", function()
+	local active = net.ReadBool()
+	local inCall = net.ReadBool()
+
+	if (active) then
+		PLUGIN.offHook = true
+	end
+
+	if (active and inCall) then
+		PLUGIN.otherSideActive   = true
+		PLUGIN.otherSideRinging  = false
+		PLUGIN.currentCallStatus = ""
+
+		net.Start("RunGetPeerName")
+		net.SendToServer()
+
+		timer.Simple(0.25, function()
+			-- wait for the vgui panel to come up (if we're picking up in this state)
+			LocalPlayer():StopSound("landline_ringtone.wav")
+			LocalPlayer():StopSound("landline_dialtone.wav")
+		end)
+	else
+		PLUGIN.otherSideRinging    = false
+		PLUGIN.otherSideActive     = false
+		PLUGIN.currentCallStatus   = "OCZEKIWANIE"
+		PLUGIN.currentCallPeerName = "Nieznany"
+
+		if (PLUGIN.panel) then
+			LocalPlayer():StopSound("landline_dialtone.wav")
+			LocalPlayer():EmitSound("landline_dialtone.wav", 40, 100, 1, CHAN_STATIC)
+		end
+	end
+end)
+
+net.Receive("OnGetPeerName", function()
+	PLUGIN.currentCallPeerName = net.ReadString()
+end)
+
+net.Receive("LineTestChat", function()
+	local text = net.ReadString()
+	local chatIcon = ix.util.GetMaterial("willardnetworks/chat/message_icon.png")
+	local color = Color(105, 157, 178)
+	local formattedText = string.format("[PHONE] %s: \"%s\"", "Test linii", text or "Błąd!")
+
+	if (ix.option.Get("standardIconsEnabled")) then
+		chat.AddText(chatIcon, color, formattedText)
+	else
+		chat.AddText(color, formattedText)
+	end
+end)
+
+net.Receive("LineStatusUpdate", function()
+	PLUGIN.currentLineStatus = net.ReadString()
+	if (PLUGIN.currentLineStatus ~= ix.phone.switch.DialStatus.Success and
+		PLUGIN.currentLineStatus ~= ix.phone.switch.DialStatus.DebugMode) then
+
+		LocalPlayer():StopSound("landline_ringtone.wav")
+		LocalPlayer():EmitSound("landline_dialtone.wav", 40, 100, 1, CHAN_STATIC)
+	elseif (PLUGIN.currentLineStatus == ix.phone.switch.DialStatus.LineBusy) then
+		LocalPlayer():EmitSound("landline_line_busy.wav", 40, 100, 1, CHAN_STATIC)
+
+	elseif (PLUGIN.currentLineStatus == ix.phone.switch.DialStatus.Success or
+		PLUGIN.currentLineStatus == ix.phone.switch.DialStatus.DebugMode) then
+		timer.Simple(0.25, function()
+			-- wait for the vgui panel to come up (if we're picking up in this state)
+			LocalPlayer():StopSound("landline_dialtone.wav")
+		end)
+	end
+end)
+
+net.Receive("ForceHangupLandlinePhone", function()
+	if (PLUGIN.panel and PLUGIN.panel.Close) then
+		PLUGIN.panel:Close()
+
+		PLUGIN.offHook = false
+		PLUGIN.otherSideRinging    = false
+		PLUGIN.otherSideActive     = false
+		PLUGIN.currentCallStatus   = "OCZEKIWANIE"
+		PLUGIN.currentCallPeerName = "Nieznany"
+
+		net.Start("RunHangupLandline")
+		net.SendToServer()
+	end
+end)

gamemodes/ixhl2rp/plugins/phone/derma/cl_landline.lua

@@ -0,0 +1,321 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+
+local PLUGIN = PLUGIN
+PLUGIN.offHook = false
+PLUGIN.otherSideRinging    = false
+PLUGIN.otherSideActive     = false
+PLUGIN.currentCallStatus   = "OCZEKIWANIE"
+PLUGIN.currentCallPeerName = "Nieznany"
+PLUGIN.currentLineStatus   = ""
+
+local dialSeq = {}
+local buttonMap = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "*", "0", "#"}
+
+local PANEL = {}
+
+function dialSeq:insert(signal)
+	self[#self+1] = signal
+end
+
+function dialSeq:reset()
+	for k, signal in ipairs(self) do
+		self[k] = nil
+	end
+end
+
+function dialSeq:asStr()
+	local dialSeqStr = ""
+	for _, signal in ipairs(self) do
+		dialSeqStr = dialSeqStr..signal
+	end
+	return dialSeqStr
+end
+
+function dialSeq:playDTMFTone(signal)
+	local _signal = signal
+	if (signal == "*") then _signal = "asterisk" end
+	if (signal == "#") then _signal = "pound" end
+
+	surface.PlaySound("dtmftones/dtmfgen_".._signal..".wav")
+end
+
+function PANEL:Init()
+	PLUGIN.currentLineStatus = ""
+
+	if (IsValid(PLUGIN.panel)) then
+		PLUGIN.panel:Remove()
+	end
+
+	self:SetSize(500, 780)
+	self:Center()
+	self:CenterHorizontal(0.6)
+	self:SetBackgroundBlur(false)
+	self:SetDeleteOnClose(true)
+	self:SetTitle(" ")
+	self:ShowCloseButton(false)
+	self:IsDraggable(true)
+
+	self.verStamp = self:Add("DLabel")
+	self.verStamp:Dock(TOP)
+	self.verStamp:DockMargin(0, 7, 55, 0)
+	self.verStamp:SetFont("DermaDefaultBold")
+	self.verStamp:SetHeight(30)
+	self.verStamp:SetColor(Color(215, 240, 231))
+	self.verStamp:SetText(L("UU pbxOS BETA v0.254ga - NODEID - "..tostring(PLUGIN.targetedLandlineEndpointID)))
+	self.verStamp:SetContentAlignment(9)
+
+	self.status = self:Add("DLabel")
+	self.status:Dock(TOP)
+	self.status:DockMargin(0, -10, 0, 0)
+	self.status:SetFont("DermaDefaultBold")
+	self.status:SetHeight(30)
+	self.status:SetColor(Color(215, 240, 231))
+	local _connStatus = "DISCONNECTED!"
+	local _curPBX = "N/A"
+	if (PLUGIN.targetedLandlinePBX and PLUGIN.targetedLandlinePBX > 0) then
+		_connStatus = "ACTIVE"
+		_curPBX = "0"..tostring(PLUGIN.targetedLandlinePBX)
+	end
+	self.status:SetText(L("Connection Status: ".._connStatus))
+	self.status:SetContentAlignment(5)
+
+	self.name = self:Add("DLabel")
+	self.name:Dock(TOP)
+	self.name:DockMargin(0, 4, 75, 0)
+	self.name:SetText(L(tostring(PLUGIN.targetedLandlineName)))
+	self.name:SetHeight(35)
+	self.name:SetFont("CloseCaption_Bold")
+	self.name:SetColor(Color(15, 13, 44, 220))
+	self.name:SetContentAlignment(9)
+
+	self.pBX = self:Add("DLabel")
+	self.pBX:Dock(TOP)
+	self.pBX:DockMargin(75, 4, 0, 0)
+	self.pBX:SetText(L("PBX   :> ".._curPBX))
+	self.pBX:SetHeight(35)
+	self.pBX:SetFont("CloseCaption_Bold")
+	self.pBX:SetColor(Color(15, 13, 44, 220))
+	self.pBX:SetContentAlignment(7)
+
+	self.ext = self:Add("DLabel")
+	self.ext:Dock(TOP)
+	self.ext:DockMargin(75, 4, 0, 0)
+	self.ext:SetText(L("EXT   :> "..tostring(PLUGIN.targetedLandlineExt)))
+	self.ext:SetHeight(35)
+	self.ext:SetFont("CloseCaption_Bold")
+	self.ext:SetColor(Color(15, 13, 44, 220))
+	self.ext:SetContentAlignment(7)
+
+	self.dialSeqText = self:Add("DLabel")
+	self.dialSeqText:Dock(TOP)
+	self.dialSeqText:DockMargin(75, 4, 0, 0)
+	self.dialSeqText:SetText(L("DIAL :> "))
+	self.dialSeqText:SetHeight(50)
+	self.dialSeqText:SetFont("CloseCaption_Bold")
+	self.dialSeqText:SetColor(Color(15, 13, 44, 220))
+	self.dialSeqText:SetContentAlignment(7)
+
+	local close = vgui.Create("DButton")
+	close:SetText(L("close"))
+	close:SetSize(70, 70)
+	close.DoClick = function()
+		dialSeq:playDTMFTone("#")
+		self:Close()
+
+		PLUGIN.offHook = false
+		PLUGIN.otherSideRinging    = false
+		PLUGIN.otherSideActive     = false
+		PLUGIN.currentCallStatus   = "OCZEKIWANIE"
+		PLUGIN.currentCallPeerName = "Nieznany"
+
+		net.Start("RunHangupLandline")
+		net.SendToServer()
+
+		LocalPlayer():StopSound("landline_ringtone.wav")
+		LocalPlayer():StopSound("landline_dialtone.wav")
+	end
+
+	local dial = vgui.Create("DButton")
+	dial:SetText(L("Dial"))
+	dial:SetColor(Color(0, 255, 0))
+	dial:SetSize(70, 70)
+	dial.DoClick = function()
+		if (PLUGIN.otherSideRinging or PLUGIN.otherSideActive or
+			PLUGIN.currentCallStatus ~= "OCZEKIWANIE") then
+			return
+		end
+
+		net.Start("BeginDialToPeer")
+			net.WriteString(dialSeq:asStr())
+			net.WriteInt(PLUGIN.targetedLandlinePBX, 5)
+			net.WriteInt(PLUGIN.targetedLandlineExt, 11)
+		net.SendToServer()
+
+		net.Start("LandlineKeyPress")
+			net.WriteInt(PLUGIN.landlineEntIdx, 17)
+		net.SendToServer()
+
+		PLUGIN.offHook = true
+		PLUGIN.otherSideRinging  = true
+		PLUGIN.otherSideActive   = false
+		PLUGIN.currentCallStatus = "RINGING"
+
+		-- doing this instead of surface.PlaySound so we can stop it
+		LocalPlayer():EmitSound("landline_ringtone.wav", 40, 100, 1, CHAN_STATIC)
+	end
+
+	local reset = vgui.Create("DButton")
+	reset:SetText(L("Reset"))
+	reset:SetColor(Color(255, 0, 0))
+	reset:SetSize(70, 70)
+	reset.DoClick = function()
+		dialSeq:reset()
+		dialSeq:playDTMFTone("0")
+		self.dialSeqText:SetText(L("DIAL :> "))
+
+		net.Start("LandlineKeyPress")
+			net.WriteInt(PLUGIN.landlineEntIdx, 17)
+		net.SendToServer()
+	end
+
+	self.optsGrid = self:Add("DGrid")
+	self.optsGrid:SetPos(350, 400)
+	self.optsGrid:SetCols(1)
+	self.optsGrid:SetColWide(80)
+	self.optsGrid:SetRowHeight(80)
+
+	self.optsGrid:AddItem(reset)
+	self.optsGrid:AddItem(dial)
+	self.optsGrid:AddItem(close)
+
+	self.numberGrid = self:Add("DGrid")
+	self.numberGrid:SetPos(100, 400)
+	self.numberGrid:SetCols(3)
+	self.numberGrid:SetColWide(80)
+	self.numberGrid:SetRowHeight(80)
+
+	for _, key in ipairs(buttonMap) do
+		local button = vgui.Create("DButton")
+		button:SetText(key)
+		button:SetSize(70, 70)
+		button:SetFont("DermaLarge")
+
+		button.DoClick = function()
+			dialSeq:playDTMFTone(key)
+			dialSeq:insert(key)
+			self.dialSeqText:SetText(L("DIAL :> "..dialSeq:asStr()))
+
+			LocalPlayer():StopSound("landline_dialtone.wav")
+
+			net.Start("LandlineKeyPress")
+				net.WriteInt(PLUGIN.landlineEntIdx, 17)
+			net.SendToServer()
+		end
+
+		self.numberGrid:AddItem(button)
+	end
+
+	self:MakePopup()
+	self:SetKeyboardInputEnabled(false)
+	PLUGIN.panel = self
+
+	LocalPlayer():EmitSound("landline_dialtone.wav", 40, 100, 1, CHAN_STATIC)
+end
+
+function PANEL:OnRemove()
+	PLUGIN.panel = nil
+	dialSeq:reset()
+
+	LocalPlayer():StopSound("landline_dialtone.wav")
+	LocalPlayer():StopSound("landline_line_busy.wav")
+end
+
+-- YES I know this is a bit of a mess but, what can you do?? its DERMA
+function PANEL:Paint(w, h)
+	-- background
+	draw.RoundedBox(6, 0, 0, w, h, Color(35, 35, 45, 200))
+
+	surface.SetDrawColor(61, 61, 77, 255)
+	surface.DrawOutlinedRect(0, 0, w, h, 2)
+
+	-- "screen"
+	draw.RoundedBox(6, 60, 20, 390, 350, Color(215, 240, 231))
+	-- outline
+	surface.SetDrawColor(15, 13, 44, 255)
+	surface.DrawOutlinedRect(65, 30, 380, 320, 4)
+
+	-- boxes:
+	local drawOutlineBoxPair = function (x, y, w, h, thick, darker, black)
+		surface.SetDrawColor(150, 150, 140, 100)
+		if (darker) then
+			surface.SetDrawColor(150, 150, 140, 150)
+		end
+		if (black) then
+			surface.SetDrawColor(0, 0, 0, 255)
+		end
+		surface.DrawRect(x, y, w, h)
+		surface.SetDrawColor(15, 13, 44, 255)
+		surface.DrawOutlinedRect(x, y, w, h, thick)
+	end
+	-- top box
+	drawOutlineBoxPair(65, 30, 376, 55, 3, false, true)
+	-- name
+	drawOutlineBoxPair(67, 85, 376, 38, 2)
+	-- exchange
+	drawOutlineBoxPair(67, 123, 376, 38, 2, true)
+	-- ext
+	drawOutlineBoxPair(67, 161, 376, 38, 2)
+	-- dial
+	drawOutlineBoxPair(67, 199, 376, 38, 2, true)
+	-- status
+	drawOutlineBoxPair(65, 295, 376, 55, 3, false, true)
+
+	-- line status text
+	surface.SetFont("phoneMonoDebug")
+	surface.SetTextColor(15, 13, 44, 220)
+	local lineStatusHeight = 13
+	local lineStatusLineNo = 1
+	for lineStatusLine in string.gmatch(PLUGIN.currentLineStatus, "[^\n]+") do
+		surface.SetTextPos(80, 227 + (lineStatusHeight * lineStatusLineNo))
+		surface.DrawText(lineStatusLine)
+		lineStatusLineNo = lineStatusLineNo + 1
+	end
+
+	-- call status text (YES i know)
+	surface.SetFont("CloseCaption_Normal")
+	surface.SetTextColor(215, 240, 231, 255)
+	surface.SetTextPos(75, 300)
+	surface.DrawText("STATUS :> ")
+	surface.SetFont("CloseCaption_Bold")
+	if (PLUGIN.targetedLandlinePBX and PLUGIN.targetedLandlinePBX == 0) then
+		surface.DrawText("NOT SET UP")
+	else
+		surface.DrawText(tostring(PLUGIN.currentCallStatus))
+	end
+	surface.SetTextPos(190, 300)
+	if (PLUGIN.otherSideActive == true and PLUGIN.currentCallStatus == "") then
+		surface.SetFont("CloseCaption_Normal")
+		surface.DrawText(tostring(PLUGIN.currentCallPeerName) or "Nieznany")
+		surface.SetFont("CloseCaption_Bold")
+	end
+
+	-- time text
+	surface.SetTextColor(215, 240, 231, 255)
+	surface.SetTextPos(70, 35)
+	local ostime = os.time()
+	surface.SetFont("DermaDefaultBold")
+	surface.DrawText(os.date("%H:%M:%S", ostime))
+	surface.SetTextPos(70, 50)
+	surface.DrawText(ix.config.Get("day").."/"..ix.config.Get("month").."/"..ix.config.Get("year"))
+end
+
+vgui.Register("ixLandlineDial", PANEL, "DFrame")

gamemodes/ixhl2rp/plugins/phone/entities/entities/landline_phone.lua

@@ -0,0 +1,287 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+ENT.Type = "anim"
+ENT.Base = "base_gmodentity"
+
+ENT.PrintName = "Landline Phone"
+ENT.Author = "M!NT"
+ENT.Category = "HL2 RP"
+ENT.Contact = ""
+ENT.Purpose = ""
+ENT.Instructions = ""
+ENT.Spawnable = false
+ENT.AdminOnly = true
+ENT.Holdable = true
+ENT.offHook = false
+ENT.inUseBy = nil
+ENT.isRinging = false
+ENT.defaultRingTime = 60  -- how long the phone will ring (in seconds)
+ENT.endpointID = nil
+ENT.ringCallback = nil      -- FnOnce that is called when the phone stops ringing for whatever reason
+ENT.hangUpCallback = nil    -- FnOnce that is called when the user runs hang up during a call
+ENT.currentName = "Unknown" -- public name as stored currently in the PBX
+ENT.currentPBX = 0          -- PBX this entity is attached to
+ENT.currentExtension = nil  -- extension in the PBX
+
+function ENT:GetIndicatorPos()
+    local btnPos = self:GetPos()
+
+    btnPos = btnPos + self:GetForward() * 4.3
+    btnPos = btnPos + self:GetRight() * -1.1
+    btnPos = btnPos + self:GetUp() * 2.0
+
+    return btnPos
+end
+
+if SERVER then
+    util.AddNetworkString("UpdateLandlineEntStatus")
+    util.AddNetworkString("EnterLandlineDial")
+    util.AddNetworkString("ForceHangupLandlinePhone")
+
+    function ENT:Initialize()
+        self:SetModel("models/props/cs_office/phone.mdl")
+        self:PhysicsInit(SOLID_VPHYSICS)
+        self:SetMoveType(MOVETYPE_VPHYSICS)
+        self:SetSolid(SOLID_VPHYSICS)
+
+        local phys = self:GetPhysicsObject()
+        if IsValid(phys) then
+            phys:EnableMotion(true)
+            phys:Wake()
+        end
+
+        self.endpointID = ix.phone.switch.endpoints:Register(self)
+        self.currentExtension = math.random(100, 999)
+
+        local usrCheckTimerName = "LandlineEnt"..tostring(self:EntIndex()).."UserCheck"
+        timer.Create(usrCheckTimerName, 3, 0, function()
+            -- check to see if, for some reason, inUseBy is still set but the usr is gone
+            -- if so, use the magical powers of lua to hang ourselves up
+            if (IsValid(self.inUseBy) and self.inUseBy:IsPlayer()) then
+                local plys = ix.phone.switch.endpoints:GetPlayersInRadius(self.endpointID, 30)
+                if (!plys or table.Count(plys) < 1 or
+                    !IsValid(plys[self.inUseBy:SteamID64()])) then
+
+                    net.Start("ForceHangupLandlinePhone")
+                    net.Send(self.inUseBy)
+
+                    self:HangUp()
+                end
+            else
+                -- we shouldn't be offHook if we dont have inUseBy set
+                if (!IsValid(self.inUseBy) and self.offHook) then
+                    self:HangUp()
+                end
+            end
+        end)
+
+        self:CallOnRemove("OnRemoveLandlineCleanup", function(ent)
+            if (self.currentExtension and self.currentPBX) then
+                return
+            end
+
+            local connID = ix.phone.switch:GetActiveConnection(self.currentPBX,
+                self.currentExtension)
+
+            if (connID) then
+                ix.phone.switch:Disconnect(connID)
+            end
+
+            timer.Remove(usrCheckTimerName)
+        end)
+    end
+
+    function ENT:PerformPickup(client)
+        if timer.Exists("ixCharacterInteraction" .. client:SteamID()) then return end
+
+        client:PerformInteraction(.5, self, function(_)
+            client:GetCharacter():GetInventory():Add("landline_phone")
+            self:Remove()
+        end)
+    end
+
+    function ENT:Use(activator)
+        if (self.nextUse and self.nextUse > CurTime()) then
+            return
+        end
+
+        self.nextUse = CurTime() + 1
+
+        if (activator:GetMoveType() == MOVETYPE_FLY) then
+            return self:PerformPickup(activator)
+        end
+
+        if (!self.offHook) then
+            -- User is trying to pick up the phone
+            self.inUseBy = activator
+
+            self:SetModel("models/props/cs_office/phone_p1.mdl")
+
+            ix.phone.switch:SetCharVars(self.inUseBy:GetCharacter(),
+                true, self.currentPBX, self.currentExtension)
+
+            ix.phone.switch.endpoints:AddListener(self.endpointID, self.inUseBy)
+
+            if (self.isRinging) then
+                timer.Remove("PhoneRinging"..self.endpointID)
+                self:StopSound("landline_ringtone.wav")
+
+                self.isRinging = false
+                self:broadcastStatusOnChange()
+
+                local _, _ = pcall(self.ringCallback, true)
+                self.ringCallback = nil
+            end
+
+            self:EmitSound("landline_hangup.wav", 60, 100, 1, CHAN_STATIC)
+
+            timer.Simple(0.1, function() -- dont ask me why we have to wait one frame. we just do. thanks garry
+                self.offHook = true
+                net.Start("EnterLandlineDial")
+                    net.WriteInt(tonumber(self.endpointID), 15)
+                    net.WriteInt(tonumber(self.currentPBX), 5)
+                    net.WriteInt(tonumber(self.currentExtension), 11)
+                    net.WriteString(self.currentName)
+                    net.WriteInt(self:EntIndex(), 17)
+                net.Send(self.inUseBy)
+            end)
+        end
+	end
+
+    function ENT:EnterRing(callback)
+        -- this entity getting 'called'
+        self:EmitSound("landline_ringtone.wav", 75, 100, 1, CHAN_STATIC)
+        self.isRinging = true
+        self.ringCallback = callback
+
+        self:broadcastStatusOnChange()
+
+        timer.Create("PhoneRinging"..self.endpointID, self.defaultRingTime, 1, function ()
+            -- phone has rung too long
+            self.isRinging = false
+            self.offHook = false
+            self:broadcastStatusOnChange()
+
+            local _, _ = pcall(self.ringCallback, false)
+            self.ringCallback = nil
+        end)
+    end
+
+    function ENT:hangupDuringRing()
+        if (!self.isRinging or !timer.Exists("PhoneRinging"..self.endpointID)) then
+            return nil
+        end
+
+        timer.Remove("PhoneRinging"..self.endpointID)
+        self:StopSound("landline_ringtone.wav")
+        self:EmitSound("landline_hangup.wav", 60, 100, 1, CHAN_STATIC)
+
+        self.isRinging = false
+        self.offHook = false
+        self:broadcastStatusOnChange()
+
+        local _, _ = pcall(self.ringCallback, false)
+    end
+
+    function ENT:hangupDuringOffHook()
+        self:EmitSound("landline_hangup.wav", 60, 100, 1, CHAN_STATIC)
+        if (self.inUseBy) then
+            ix.phone.switch:ResetCharVars(self.inUseBy:GetCharacter())
+
+            ix.phone.switch.endpoints:RmListener(self.endpointID, self.inUseBy)
+        end
+
+        self.offHook = false
+
+        self:broadcastStatusOnChange()
+        if (self.hangUpCallback) then
+            local _, _ = pcall(self.hangUpCallback)
+            self.hangUpCallback = nil
+        end
+    end
+
+    function ENT:ButtonPress()
+        -- play a button clack sound because atle wants it
+        local soundName = "landline_clack_"..tostring(math.random(1, 4))..".wav"
+        self:EmitSound(soundName, 50, 100, 1, CHAN_STATIC)
+    end
+
+    function ENT:HangUp()
+        self:SetModel("models/props/cs_office/phone.mdl")
+
+        if (!self.isRinging and !self.offHook) then
+            self:EmitSound("landline_hangup.wav", 70, 100, 1, CHAN_STATIC)
+            return
+        end
+
+        if (self.offHook) then
+            self:hangupDuringOffHook()
+        end
+
+        if (self.isRinging) then
+            self:hangupDuringRing()
+        end
+
+        self.inUseBy = nil
+    end
+
+    function ENT:broadcastStatusOnChange()
+        net.Start("UpdateLandlineEntStatus")
+            net.WriteBool(self.isRinging)
+            net.WriteBool(self.offHook)
+            net.WriteInt(self.currentPBX, 11)
+            net.WriteInt(self.currentExtension, 15)
+        net.Broadcast()
+    end
+else
+    local glowMaterial = ix.util.GetMaterial("sprites/glow04_noz")
+    local colorGreen = Color(0, 255, 0, 255)
+    local colorRed = Color(255, 50, 50, 255)
+    local isRinging = false
+    local offHook = false
+    local nextFlashTime = CurTime()
+
+    net.Receive("UpdateLandlineEntStatus", function()
+        isRinging = net.ReadBool()
+        offHook = net.ReadBool()
+
+        -- reset the indicator status flashing
+        colorRed.a = 255
+        if (isRinging) then
+            nextFlashTime = CurTime() + 1
+        end
+    end)
+
+    function ENT:Draw()
+        self:DrawModel()
+
+        local btnPos = self:GetIndicatorPos()
+
+        render.SetMaterial(glowMaterial)
+
+        if (isRinging) then
+            -- slow flash
+            if (CurTime() > nextFlashTime) then
+                colorRed.a = 255
+                if (CurTime() > nextFlashTime + 0.5) then
+                    nextFlashTime = CurTime() + 0.5
+                end
+            else
+                colorRed.a = 0
+            end
+            render.DrawSprite(btnPos, 1, 1, colorRed)
+        elseif (offHook) then
+		    render.DrawSprite(btnPos, 1, 1, colorRed)
+        else
+            render.DrawSprite(btnPos, 1, 1, colorGreen)
+        end
+    end
+end

gamemodes/ixhl2rp/plugins/phone/items/phone/sh_landline.lua

@@ -0,0 +1,48 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+
+local PLUGIN = PLUGIN
+
+ITEM.name = "Telefon stacjonarny"
+ITEM.model = Model("models/props/cs_office/phone.mdl")
+ITEM.description = "Najzwyklejszy telefon stacjonarny."
+ITEM.width = 2
+ITEM.height = 2
+ITEM.category = "Technology"
+ITEM.functions.Deploy = {
+    name = "Deploy",
+    OnRun = function(itemTable)
+		local client = itemTable.player
+		if client.CantPlace then
+			client:NotifyLocalized("Musisz poczekać zanim będziesz mógł to postawić!..")
+			return false
+		end
+
+		client.CantPlace = true
+
+		timer.Simple(3, function()
+			if client then
+				client.CantPlace = false
+			end
+		end)
+
+		local phone = ents.Create("landline_phone")
+		local tr    = client:GetEyeTrace()
+		local dist  = client:EyePos():Distance(tr.HitPos)
+
+		phone:SetPos(client:EyePos() + (tr.Normal * math.Clamp(dist, 0, 75)))
+		phone:Spawn()
+
+		ix.saveEnts:SaveEntity(phone)
+
+		return true
+	end
+}

gamemodes/ixhl2rp/plugins/phone/libs/sv_connections.lua

@@ -0,0 +1,198 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+
+-- a volatile table for caching ongoing connections
+ix.phone.switch.connections = ix.phone.switch.connections or {}
+
+function ix.phone.switch:ConnectionValid(connID)
+    if (self.connections[connID] == false) then
+        return false
+    end
+
+    return istable(self.connections[connID])
+end
+
+function ix.phone.switch:buildNewConnectionNode(connID, extID, extNum)
+    -- helper function to create source requests for connections
+    -- constructs a table that can be used by ix.phone.switch:connect()
+    if (!self:ConnectionValid(connID)) then
+        return
+    end
+
+    if (!self.connections[connID].nodes) then
+        self.connections[connID].nodes = {}
+    end
+
+    local nodeID = #self.connections[connID].nodes + 1
+    self.connections[connID].nodes[nodeID] = {}
+    self.connections[connID].nodes[nodeID]["exchange"] = extID
+    self.connections[connID].nodes[nodeID]["extension"] = extNum
+end
+
+function ix.phone.switch:buildNewConnection()
+    -- helper function to that creates a new connection
+
+    -- attempt to reuse a freshly terminated connection
+    for id, conn in ipairs(self.connections) do
+        if (conn == false) then
+            self.connections[id] = {}
+            return id
+        end
+    end
+
+    -- no terminated connections
+    connectionID = #self.connections + 1
+    self.connections[connectionID] = {}
+
+    return connectionID
+end
+
+function ix.phone.switch:Disconnect(connID, noNotify)
+    -- disconnects provided connection at connID
+    -- if notify is set, then it wont notify listeners that the connection is terminated
+    if (!istable(self.connections[connID])) then
+        return
+    end
+
+    local _nodes = self.connections[connID].nodes
+    for _, node in ipairs(_nodes) do
+        local recievers = self:getReceivers(node.exchange, node.extension)
+
+        if (!istable(recievers) or table.Count(recievers) < 1) then
+            continue
+        end
+
+        for _, reciever in ipairs(recievers) do
+            local ent = self.endpoints:GetEndpoint(reciever.endID)
+            if (ent and ent.HangUp and ent.isRinging) then
+                ent:HangUp()
+            end
+        end
+
+        local listeners = self:getListenersFromRecvs(recievers)
+
+        if (!listeners or table.Count(listeners) < 1) then
+            continue
+        end
+
+        for _, listener in ipairs(listeners) do
+            self:DisconnectClient(listener)
+        end
+    end
+
+    self.connections[connID] = false
+end
+
+-- disconnects the client's status and notifies them of said status change
+-- IMPORTANT: Make sure you destroy the connection too!
+function ix.phone.switch:DisconnectClient(client)
+    if (!client or !IsValid(client)) then
+        return ErrorNoHaltWithStack("Attempt to disconnect invalid client "..tostring(client))
+    end
+
+    local character = client:GetCharacter()
+    if (!istable(character)) then
+        return ErrorNoHaltWithStack("Attempt to disconnect client with invalid character "..tostring(character))
+    end
+
+    self:ResetCharVars(character)
+    self:NotifyStatusChange(client, false, false)
+end
+
+function ix.phone.switch:NotifyStatusChange(client, bCallActive, bInCall)
+    net.Start("ixConnectedCallStatusChange")
+        net.WriteBool(bCallActive)
+        net.WriteBool(bInCall)
+    net.Send(client)
+end
+
+function ix.phone.switch:NotifyAllListenersOfStatusChange(endID, bCallActive, bInCall)
+    local listeners = self.endpoints:GetListeners(endID)
+    if (!listeners or table.Count(listeners) < 1) then
+        return -- no need to do anything; no listeners
+    end
+
+    for _, listener in ipairs(listeners) do
+        -- notify all listeners of their call status change
+        self:NotifyStatusChange(listener, bCallActive, bInCall)
+    end
+end
+
+function ix.phone.switch:getListenersFromRecvs(recievers)
+    local listeners = {}
+    for k, recv in ipairs(recievers) do
+        -- there will almost always be one reciever.. but treating this as a list in case we ever do 'conference calls'
+        local _listeners = self.endpoints:GetListeners(recv.endID)
+        if (istable(_listeners)) then
+            for _, listener in ipairs(_listeners) do
+                listeners[table.Count(listeners) + 1] = listener
+            end
+        end
+    end
+
+    return listeners
+end
+
+function ix.phone.switch:getReceivers(extID, extNum)
+    local conn = self:GetActiveConnection(extID, extNum)
+    if (!istable(conn)) then
+        return
+    end
+
+    return self:getSourceRecieversFromConnection(conn.targetConnID,
+        conn.sourceNodeID)
+end
+
+function ix.phone.switch:GetListeners(extID, extNum)
+    return self:getListenersFromRecvs(self:getReceivers(extID, extNum))
+end
+
+function ix.phone.switch:GetReceivers(extID, extNum)
+    local conn = self:GetActiveConnection(extID, extNum)
+    if (!istable(conn)) then
+        return
+    end
+
+    return self:getSourceRecieversFromConnection(conn.targetConnID,
+        conn.sourceNodeID)
+end
+
+-- returns the active connection in the form of {"targetConnID", "sourceNodeID"} if one is present
+function ix.phone.switch:GetActiveConnection(extID, extNum)
+    for connID, conn in ipairs(self.connections) do
+        if (conn == false) then
+            continue
+        end
+
+        for nodeID, node in ipairs(conn.nodes) do
+            if (node["exchange"] == extID and node["extension"] == extNum) then
+                -- source is present in this connection
+                return {targetConnID = connID, sourceNodeID = nodeID}
+            end
+        end
+    end
+end
+
+-- returns the actively connected (except for the source) recievers for a given connection
+function ix.phone.switch:getSourceRecieversFromConnection(connID, sourceNodeID)
+    local res = {}
+    for nodeID, node in ipairs(self.connections[connID].nodes) do
+        if (nodeID != sourceNodeID) then
+            -- we want to return this as it exists in the exchange as that will give us 
+            -- extra details the node tree does not contain such as name and endID
+            res[#res + 1] = self:GetDest(node["exchange"], node["extension"])
+        end
+    end
+
+    return res
+end

gamemodes/ixhl2rp/plugins/phone/libs/sv_endpoints.lua

@@ -0,0 +1,123 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+
+-- a flat list of all the entities. each entity has an associated 'listeners' table which contains all of the players actively connected to that entity
+ix.phone.switch.endpoints = ix.phone.switch.endpoints or {}
+
+function ix.phone.switch.endpoints:exists(id)
+    return self[id] != nil
+end
+
+function ix.phone.switch.endpoints:entExists(entIdx)
+    for id, ent in ipairs(self) do
+        if (entIdx == ent:EntIndex()) then
+            return id
+        end
+    end
+    return nil
+end
+
+function ix.phone.switch.endpoints:Register(ent)
+    -- assigns an ID. if the ent already exists then it will return the existing id
+    -- we need to have our own ID here rather than the index because the entity index might change but
+    -- in that case the id shouldn't
+
+    local entExists = self:entExists(ent:EntIndex())
+    if (entExists != nil) then
+        return nil
+    end
+
+    local newID = math.random(1000, 9999)
+    if (self:exists(newID)) then
+        return nil
+    end
+
+    self[newID] = ent
+    return newID
+end
+
+function ix.phone.switch.endpoints:DeRegister(id)
+    self[id] = nil
+end
+
+function ix.phone.switch.endpoints:GetEndpoint(id)
+    -- returns the associated entity table
+    if (self:exists(id)) then
+        return self[id]
+    end
+end
+
+function ix.phone.switch.endpoints:AddListener(id, client)
+    if (!istable(self[id].listeners)) then
+        self[id].listeners = {}
+    end
+
+    for _, listener in ipairs(self[id].listeners) do
+        if (listener == client) then
+            return
+        end
+    end
+
+    self[id].listeners[table.Count(self[id].listeners) + 1] = client
+end
+
+function ix.phone.switch.endpoints:RmListener(id, client)
+    if (!istable(self[id].listeners)) then
+        return
+    end
+
+    for k, listener in ipairs(self[id].listeners) do
+        if (listener == client) then
+            self[id].listeners[k] = nil
+        end
+    end
+end
+
+function ix.phone.switch.endpoints:GetListeners(id)
+    return self[id].listeners
+end
+
+function ix.phone.switch.endpoints:RingEndpoint(id, callback)
+    -- rings and endpoint and, if the phone is picked up, it will call callback as true. otherwise false
+    -- if the destination is unavailable or busy then it will return nil
+    local ent = self:GetEndpoint(id)
+
+    if (ent.inUse or ent.isRinging) then
+        return nil
+    end
+
+    ent:EnterRing(callback)
+end
+
+function ix.phone.switch.endpoints:GetPlayersInRadiusFromPos(pos, radius)
+    local entsInside = ents.FindInSphere(pos, radius)
+    local res = {}
+
+    for _, _ent in ipairs(entsInside) do
+        if (_ent:IsPlayer() and _ent.GetCharacter and _ent:GetCharacter()) then
+            res[_ent:SteamID64()] = _ent
+        end
+    end
+
+    return res
+end
+
+-- returns a list of players within X radius of the endpoint
+function ix.phone.switch.endpoints:GetPlayersInRadius(id, radius)
+    local ent = self:GetEndpoint(id)
+    if (!ent) then
+        return
+    end
+
+    return self:GetPlayersInRadiusFromPos(ent:GetPos(), radius)
+end

gamemodes/ixhl2rp/plugins/phone/libs/sv_exchange.lua

@@ -0,0 +1,100 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+ 
+-- a table used for managing pbxs and their members
+ix.phone.switch.exchanges = ix.phone.switch.exchanges or {}
+
+--[[ The following is some boiler plate code for creating and managing extensions and exchanges
+    In practice these things are just keys in a table and in the DB but it is probably best
+    if you use the functions here and not directly modify ix.phone.switch.exchanges directly!
+
+    This is necessary to keep the switching code readable 
+]]
+function ix.phone.switch:AddExchange(exID)
+    if (self:ExchangeExists(exID)) then
+        return false
+    end
+
+    self.exchanges[exID] = {}
+    return true
+end
+
+function ix.phone.switch:RmExchange(exID)
+    if (!self:ExchangeExists(exID)) then
+        return false
+    end
+
+    self.exchanges[exID] = nil
+    return true
+end
+
+function ix.phone.switch:ExchangeExists(exID)
+    return self.exchanges[exID] != nil
+end
+
+function ix.phone.switch:DestExists(exID, extNum)
+    if (self.exchanges[exID] != nil) then
+        return self.exchanges[exID][extNum] != nil
+    else
+        return false
+    end
+end
+
+function ix.phone.switch:AddDest(exID, extNum, extName, endID)
+    -- returns false if destination exists or exchange doesn't
+    -- set noDB if you do not wish to store this destination to the database
+    if (self:DestExists(exID, extNum)) then
+        return false
+    end
+
+    self.exchanges[exID][extNum] = {}
+    self.exchanges[exID][extNum]["name"] = extName or ""
+    self.exchanges[exID][extNum]["endID"] = endID
+    return true
+end
+
+function ix.phone.switch:GetDest(exID, extNum)
+    if (!self:DestExists(exID, extNum)) then
+        return false
+    end
+
+    return self.exchanges[exID][extNum]
+end
+
+function ix.phone.switch:RmDest(exID, extNum)
+    -- returns false if destination does not exist
+    if (!self:DestExists(exID, extNum)) then
+        return false
+    end
+
+    self.exchanges[exID][extNum] = nil
+
+    return true
+end
+
+function ix.phone.switch:MvDest(fromExID, fromExtNum, toExID, toExtNum)
+    if (!self:RmDest(fromExID, fromExtNum)) then
+        return false
+    end
+
+    return self:AddDest(toExID, toExtNum)
+end
+
+function ix.phone.switch:SetName(exID, extNum, name)
+    if (!self:DestExists(exID, extNum)) then
+        return false
+    end
+
+    self.endpoints[self.exchanges[exID][extNum]["endID"]].currentName = name
+    return true
+end

gamemodes/ixhl2rp/plugins/phone/libs/sv_switch.lua

@@ -0,0 +1,402 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+-- this is a loose implementation of a virtual private business exchange (vPBX)
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+ix.phone.switch.lineTestPBX = 9
+ix.phone.switch.lineTestExt = 999 -- reserved for testing
+
+do
+    -- set up ent to use for 2 way call testing
+    timer.Simple(10, function()
+        local lineTestEnt = ents.Create("landline_phone")
+        lineTestEnt:SetPos(Vector(0, 0, 0))
+        lineTestEnt:Spawn()
+        lineTestEnt:SetNoDraw(true)
+        -- if we dont do this then our landline point ent will fall through the world
+        -- and get deleted
+        local _phys = lineTestEnt:GetPhysicsObject()
+        _phys:EnableGravity(false)
+        _phys:EnableMotion(false)
+        _phys:Sleep()
+
+        lineTestEnt.currentName = "Line Test"
+        lineTestEnt.currentPBX = ix.phone.switch.lineTestPBX
+        lineTestEnt.currentExtension = ix.phone.switch.lineTestExt
+
+        -- yes we need a real entity for this. doesn't have to be a landline but might as well
+        ix.phone.switch.lineTestEnt = lineTestEnt
+    end)
+end
+
+--                                           (optional)
+-- takes in a dial sequence in the format of (exchange)(extension)
+--                                        ex:     1        234
+-- it returns it into a table as {"exchange", "extension"}
+function ix.phone.switch:decodeSeq(dialSeq)
+    -- dial sequences must be strings, but must be a real number as well and must be 4 digits
+    if (type(dialSeq) != "string" or tonumber(dialSeq) == nil) then
+        return nil
+    elseif (string.len(dialSeq) > 4 or string.len(dialSeq) < 3) then
+        return nil
+    end
+
+    local exchange = nil
+    if (string.len(dialSeq) != 3) then -- otherwise it is a local dial (to endpoint in own exchange)
+        exchange = tonumber(string.sub(dialSeq, 0, 1))
+        if (exchange == nil or exchange < 1) then
+            return nil
+        end
+    end
+
+    -- the remaining digits should be the extension
+    local ext = tonumber(string.sub(dialSeq, 2, 4))
+    if (ext == nil or ext < 1) then
+        return nil
+    end
+
+    return {["exchange"] = exchange, ["extension"] = ext}
+end
+
+function ix.phone.switch:BuildNewTwoWayConnection(sourceExc, sourceExt, destExc, destExt)
+    local connID = self:buildNewConnection()
+    self:buildNewConnectionNode(connID, sourceExc, sourceExt)
+    self:buildNewConnectionNode(connID, destExc, destExt)
+
+    return connID
+end
+
+function ix.phone.switch:Dial(sourceExc, sourceExt, dialSeq)
+    if (!self:DestExists(sourceExc, sourceExt)) then
+        return self.DialStatus.SourceNotExist
+    end
+
+    --[[
+        Decode the user provided dial sequence into a switchable pair of of pbx and ext
+    ]]
+    if (!istable(dialSeq) and #dialSeq < 1) then
+        return self.DialStatus.NoDialSeq
+    end
+
+    local decodedDest = self:decodeSeq(dialSeq)
+
+    if (!istable(decodedDest)) then
+        return self.DialStatus.CannotDecodeDial
+    end
+
+    if (decodedDest.exchange == self.lineTestPBX and decodedDest.extension == self.lineTestExt) then
+        self:StartLineTest(sourceExc, sourceExt)
+        return self.DialStatus.DebugMode
+    end
+
+    if (decodedDest.exchange == nil) then
+        decodedDest.exchange = sourceExc
+    end
+
+    if (!self:DestExists(decodedDest.exchange, decodedDest.extension)) then
+        return self.DialStatus.NumberNotFound
+    end
+
+    --[[
+        Get the endpoint IDs and corresponding entities for source & destination
+    ]]
+    local destination = self:GetDest(decodedDest.exchange, decodedDest.extension)
+    local source = self:GetDest(sourceExc, sourceExt)
+
+    if (!destination.endID or !source.endID) then
+        return self.DialStatus.EndpointNotFound
+    end
+
+    local destEnt = self.endpoints:GetEndpoint(tonumber(destination.endID))
+    local sourceEnt = self.endpoints:GetEndpoint(tonumber(source.endID))
+
+    --[[
+        Check if the line is busy
+    ]]
+    local _conn = self:GetActiveConnection(decodedDest.exchange, decodedDest.extension)
+    if (_conn and istable(_conn) or destEnt.offHook) then
+        return self.DialStatus.LineBusy
+    end
+
+    --[[
+        Build new connection for source & dest with the pbxs and exts.
+    ]]
+    local connID = self:BuildNewTwoWayConnection(sourceExc, sourceExt,
+        decodedDest.exchange, decodedDest.extension)
+
+    --[[
+        Setup the callbacks and start the call
+    ]]
+    local ringCallback = function(status)
+        if (!status) then -- call did not go through so we need to clean up
+            self:Disconnect(connID)
+        end
+
+        self:NotifyAllListenersOfStatusChange(tonumber(destination.endID), status, status)
+        self:NotifyAllListenersOfStatusChange(tonumber(source.endID), status, status)
+    end
+
+    destEnt:EnterRing(ringCallback) -- set the target as ringing
+
+    local hangUpCallback = function(status)
+        -- cleanup
+        self:Disconnect(connID)
+    end
+
+    destEnt.hangUpCallback = hangUpCallback
+    sourceEnt.hangUpCallback = hangUpCallback
+
+    return self.DialStatus.Success
+end
+
+-- returns back a list of player entities that are listening to the phone this character is speaking into
+function ix.phone.switch:GetCharacterActiveListeners(character)
+    if (!istable(character)) then
+        return
+    end
+
+    local connMD = character:GetLandlineConnection()
+    if (!connMD) then
+        return
+    end
+
+    return self:GetListeners(connMD.exchange, connMD.extension)
+end
+
+function ix.phone.switch:GetPlayerActiveListeners(client)
+    local character = client:GetCharacter()
+    if (!istable(character)) then
+        return nil
+    end
+
+    return self:GetCharacterActiveListeners(character)
+end
+
+-- rudely hangs up every single active call related to this character
+-- typically used when the player disconnects or switches chars mid call
+function ix.phone.switch:DisconnectActiveCallIfPresentOnClient(client)
+    local character = client:GetCharacter()
+    if (!istable(character)) then
+        return
+    end
+
+    local connMD = character:GetLandlineConnection()
+    if (!istable(connMD) and !connMD["active"]) then
+        -- probably ran hangup on a phone someone else was speaking on
+        -- we should allow this in the future (maybe?) but for now we exit
+        client:NotifyLocalized("You are not speaking on the phone.")
+        return
+    end
+
+    -- terminate any existing connections here 
+    local conn = self:GetActiveConnection(connMD["exchange"], connMD["extension"])
+    if (!istable(conn)) then
+        client:NotifyLocalized("Error: AttemptedHangupOnActivePhoneNoConn")
+        -- This shouldn't be possible but if it happens then there is some lingering issue with
+        -- this character's var being active when they are not in an active connection
+        self:ResetCharVars(character)
+        return
+    end
+
+    self:Disconnect(conn["targetConnID"])
+end
+
+-- returns whether or not the 'listener' is in an active phone call with 'speaker'
+function ix.phone.switch:ListenerCanHearSpeaker(speaker, listener)
+    local speakerChar = speaker:GetCharacter()
+    local listeners = self:GetCharacterActiveListeners(speakerChar)
+    if (!istable(listeners)) then
+        -- doubly make sure that the call activity is set correctly on the caller
+        speaker:NotifyLocalized("You are not currently on a phone call!")
+        ErrorNoHaltWithStack("Speaker ("..tostring(speaker:GetName())..") has invalid listener list!")
+        self:ResetCharVars(speakerChar)
+        return false
+    end
+
+    for _, _listener in ipairs(listeners) do
+        if (_listener == listener) then
+            return true
+        end
+    end
+
+    return false
+end
+
+--[[
+    Some helpers for setting the correct things in the correct order
+]]
+
+-- Reset ix.character.landlineConnection variables to default state
+function ix.phone.switch:ResetCharVars(character)
+    character:SetLandlineConnection({
+        active = false,
+        exchange = nil,
+        extension = nil
+    })
+end
+
+-- Set ix.character.landlineConnection variables
+function ix.phone.switch:SetCharVars(character, bActive, exc, ext)
+    character:SetLandlineConnection({
+        active = bActive,
+        exchange = exc,
+        extension = ext
+    })
+end
+
+-- Create a fake destination for testing purposes
+-- Do nothing if one exists already
+function ix.phone.switch:initLineTestNumber()
+    if (!self:ExchangeExists(self.lineTestPBX)) then
+        self:AddExchange(self.lineTestPBX)
+    end
+
+    if (!self.lineTestEnt.endpointID) then
+        self.lineTestEnt.endpointID = self.endpoints:Register(self.lineTestEnt)
+        print("Line Test Initalized! EndID: "..tostring(self.lineTestEnt.endpointID))
+    end
+
+    local destination = self:GetDest(self.lineTestPBX, self.lineTestExt)
+    if (!destination) then
+        self:AddDest(self.lineTestPBX, self.lineTestExt, "Line Test", self.lineTestEnt.endpointID)
+    end
+end
+
+-- used for debugging purposes (by doing lua_run in rcon)
+-- calls a specific landline
+function ix.phone.switch:DebugSinglePartyCall(exchange, ext)
+    if (!self:DestExists(exchange, ext)) then
+        ErrorNoHalt("Destination does not exist!")
+        return -- source does not exist or is not valid
+    end
+
+    self:initLineTestNumber()
+    local connID = self:buildNewConnection()
+    self:buildNewConnectionNode(connID, exchange, ext)
+    self:buildNewConnectionNode(connID, self.lineTestPBX, self.lineTestExt)
+
+    local dest = self:GetDest(exchange, ext)
+
+    if (!istable(dest)) then
+        self:Disconnect(connID) -- source dissapeared for some reason
+        ErrorNoHalt("Destination does not exist, or is invalid!")
+        return
+    end
+
+    print("Destination Endpoint Found!: "..table.ToString(dest, "Destination Endpoint", true))
+
+    local destEnt = self.endpoints:GetEndpoint(tonumber(dest.endID))
+    print("Destination Entity Found! ID: "..tostring(destEnt:EntIndex()))
+
+    destEnt:EnterRing(function(status)
+        if (!status) then -- call did not go through so we need to clean up
+            self:Disconnect(connID)
+        end
+
+        self:NotifyAllListenersOfStatusChange(tonumber(dest.endID), status, status)
+        local client = destEnt.inUseBy
+        net.Start("LineTestChat")
+            net.WriteString("This is a test to determine connection stability. It will automatically disconnect in 10 seconds.")
+        net.Send(client)
+
+        net.Start("LineStatusUpdate")
+            net.WriteString(self.DialStatus.DebugMode)
+        net.Send(client)
+
+        timer.Simple(15, function()
+            net.Start("LineTestChat")
+                net.WriteString("Line test has completed. Disconnecting now.")
+            net.Send(client)
+
+            self:Disconnect(connID)
+        end)
+    end)
+
+    local hangUpCallback = function()
+        -- cleanup
+        self:Disconnect(connID)
+    end
+
+    destEnt.hangUpCallback = hangUpCallback
+end
+
+-- used for debugging purposes
+-- allows landline to make a call out to a test entity placed at map root
+function ix.phone.switch:StartLineTest(exchange, ext)
+    if (!self:DestExists(exchange, ext)) then
+        ErrorNoHalt("Source does not exist!")
+        return -- source does not exist or is not valid
+    end
+
+    self:initLineTestNumber()
+    local connID = self:BuildNewTwoWayConnection(exchange, ext, self.lineTestPBX, self.lineTestExt)
+
+    local conn = self:GetActiveConnection(exchange, ext)
+    if (!istable(conn)) then
+        ErrorNoHalt("Failed to construct connection nodes! ", tostring(connID))
+        return
+    end
+
+    print("Connection nodes constructed!: "..table.ToString(conn, "ConnID: "..tostring(connID), true))
+    local source = self:GetDest(exchange, ext)
+
+    if (!istable(source)) then
+        self:Disconnect(connID) -- source dissapeared for some reason
+        ErrorNoHalt("Source does not exist, or is invalid!")
+        return
+    end
+
+    print("Source Endpoint Found!: "..table.ToString(source, "Source Endpoint", true))
+
+    local sourceEnt = self.endpoints:GetEndpoint(tonumber(source["endID"]))
+    print("Source Entity Found! ID: "..tostring(sourceEnt:EntIndex()))
+
+    local listeners = self:GetListeners(self.lineTestPBX, self.lineTestExt)
+    local client = listeners[1]
+    if (!client) then
+        self:Disconnect(connID)
+        print("Destination listener pool: "..table.ToString(listeners, "Listener Pool", true))
+        ErrorNoHalt("Destination has no listeners!")
+        return
+    end
+
+    local hangUpCallback = function()
+        -- cleanup
+        self:Disconnect(connID)
+    end
+
+    sourceEnt.hangUpCallback = hangUpCallback
+
+    print("Line Test Listener Found! ID: "..tostring(client))
+    timer.Simple(2, function()
+        net.Start("ixConnectedCallStatusChange")
+            net.WriteBool(true)
+            net.WriteBool(true)
+        net.Send(client)
+
+        net.Start("LineTestChat")
+            net.WriteString("This is a test to determine connection stability. It will automatically disconnect in 10 seconds.")
+        net.Send(client)
+    end)
+
+    timer.Simple(15, function()
+        net.Start("LineTestChat")
+            net.WriteString("Line test has completed. Disconnecting now.")
+        net.Send(client)
+
+        net.Start("ixConnectedCallStatusChange")
+            net.WriteBool(false)
+            net.WriteBool(false)
+        net.Send(client)
+
+        self:Disconnect(connID)
+    end)
+end

gamemodes/ixhl2rp/plugins/phone/sh_plugin.lua

@@ -0,0 +1,339 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+--[[
+    ring ring ring ring - LUA PHONE
+       ,==.-------.
+      (    ) ====  \
+      ||  | [][][] |
+    ,8||  | [][][] |
+    8 ||  | [][][] |
+    8 (    ) O O O /
+    '88`=='-------'
+]]
+
+local PLUGIN = PLUGIN
+
+PLUGIN.name = "Phones"
+PLUGIN.description = "Adds landlines, pagers, and ways to route them"
+PLUGIN.author = "M!NT"
+
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+
+ix.util.Include("cl_hooks.lua")
+ix.util.Include("sv_hooks.lua")
+ix.util.Include("sv_plugin.lua")
+
+CAMI.RegisterPrivilege({
+	Name = "Helix - Use Phones",
+	MinAccess = "user"
+})
+
+ix.command.Add("HangupPhone", {
+    alias = "HP",
+    description = "Odłóż telefon, na który patrzysz.",
+    arguments = {},
+    privilege = "Use Phones",
+    OnRun = function(self, client)
+        PLUGIN:runHangupOnClient(client)
+    end
+})
+
+CAMI.RegisterPrivilege({
+	Name = "Helix - Manage Phones",
+	MinAccess = "admin"
+})
+
+ix.command.Add("EditLandline", {
+    description = "Edytuj telefon stacjonarny, na który obecnie patrzysz.",
+    arguments = {
+        ix.type.number,
+        ix.type.number,
+        ix.type.text
+    },
+    privilege = "Manage Phones",
+    OnRun = function(self, client, pbx, extension, publicName)
+        if (!pbx or !extension or !publicName or string.len(publicName) < 1) then
+            client:NotifyLocalized("Podałeś nieprawidłowy argument")
+        end
+
+        -- perform input validations
+        if (pbx < 1 or pbx > 9) then
+            client:NotifyLocalized("Podany PBX jest nieprawidłowy! (musi być liczbą pomiędzy 1 a 10)")
+            return
+        end
+
+        if (!ix.phone.switch:ExchangeExists(pbx)) then
+            client:NotifyLocalized("Podany PBX '"..tostring(pbx).."' nie istnieje.")
+            return
+        end
+
+        if (extension < 100 or extension > 999) then
+            client:NotifyLocalized("Podane rozszerzenie jest nieprawidłowe! (musi być liczbą pomiędzy 100 a 1000")
+            return
+        end
+
+        if (string.len(publicName) < 1) then
+            client:NotifyLocalized("Podana nazwa publiczna jest nieprawidłowa! (musi mieć długość większą niż 1)")
+            return
+        end
+
+        local data = {}
+            data.start = client:GetShootPos()
+            data.endpos = data.start + client:GetAimVector() * 96
+            data.filter = client
+        local target = util.TraceLine(data).Entity
+
+        if (!IsValid(target) or target.PrintName != "Landline Phone") then
+            client:NotifyLocalized("Nie patrzysz obecnie na telefon.")
+            return
+        end
+
+        if (ix.phone.switch:DestExists(target.currentPBX, target.currentExtension)) then
+            print("exists")
+            ix.phone.switch:RmDest(target.currentPBX, target.currentExtension)
+        end
+
+        if (!ix.phone.switch:AddDest(pbx, extension, publicName, target.endpointID)) then
+            client:NotifyLocalized("Nie można zarejestrować telefonu przy użyciu podanych argumentów")
+            return
+        end
+
+        target.currentName      = publicName
+        target.currentPBX       = pbx
+        target.currentExtension = extension
+
+        client:NotifyLocalized("Pomyślnie zaktualizowano telefon stacjonarny.")
+    end
+})
+
+ix.command.Add("AddPBX", {
+    description = "Dodaj nową centralę PBX, jeśli jeszcze nie istnieje.",
+    arguments = {ix.type.number},
+    privilege = "Manage Phones",
+    OnRun = function(self, client, pbx)
+        if (!pbx or pbx < 1 or pbx > 9) then
+            client:NotifyLocalized("Podany PBX jest nieprawidłowy! (musi być liczbą pomiędzy 1 a 10)")
+            return
+        end
+
+        if (ix.phone.switch:AddExchange(pbx)) then
+            client:NotifyLocalized("PBX '"..tostring(pbx).."' został pomyślnie utworzony!")
+        else
+            client:NotifyLocalized("PBX '"..tostring(pbx).."' już istnieje!")
+            return
+        end
+    end
+})
+
+ix.command.Add("RemovePBX", {
+    description = "Usuń istniejącą centralę PBX (zatrzyma wszystkie aktywne połączenia na tej centrali PBX i wyrejestruje wszystkie aktualnie podłączone telefony!)",
+    arguments = {ix.type.number},
+    privilege = "Manage Phones",
+    OnRun = function(self, client, pbx)
+        if (!pbx or pbx < 1 or pbx > 9) then
+            client:NotifyLocalized("Podany PBX jest nieprawidłowy! (musi być liczbą pomiędzy 1 a 10)")
+            return
+        end
+
+        if (!ix.phone.switch:ExchangeExists(pbx)) then
+            client:NotifyLocalized("PBX '"..tostring(pbx).."' nie istnieje!")
+            return
+        end
+
+        -- stop all active connections
+        for ext, md in ipairs(ix.phone.switch.exchanges[pbx]) do
+            local connMd = ix.phone.switch:GetActiveConnection(pbx, ext)
+            if (istable(connMd)) then
+                ix.phone.switch:Disconnect(connMD.targetConnID)
+            end
+        end
+
+        ix.phone.switch:RmExchange(pbx)
+
+        client:NotifyLocalized("PBX '"..tostring(pbx).."' został zdekonstruowany.")
+    end
+})
+
+ix.char.RegisterVar("landlineConnection", {
+	field = "landlineConnection",
+	fieldType = ix.type.table,
+	default = {
+        active = false,
+        exchange = nil,
+        extension = nil
+    },
+	bNoDisplay = true,
+	isLocal = true,
+	OnSet = function(self, value)
+		local client = self:GetPlayer()
+
+        if (!IsValid(client)) then
+            return nil
+        end
+
+        self.vars.landlineConnection = {
+            active    = value["active"],
+            exchange  = value["exchange"],
+            extension = value["extension"]
+        }
+	end,
+	OnGet = function(self, default)
+        local connMetaData = self.vars.landlineConnection
+        return connMetaData
+	end,
+    OnAdjust = function(self, client, data, value, newData)
+		newData.landlineConnection = value
+	end
+})
+
+do
+    local phoneChatCommands = {
+        phonesay = {
+            alias = "PS",
+            description = "Mów do telefonu, jeśli go trzymasz.",
+            range = ix.config.Get("chatRange", 280),
+        },
+        phonewhisper = {
+            alias = "PW",
+            description = "Szepcz do telefonu, jeśli go trzymasz.",
+            range = ix.config.Get("chatRange", 280) / 4,
+        },
+        phoneyell = {
+            alias = "PY",
+            description = "Krzycz do telefonu, jeśli go trzymasz.",
+            range = ix.config.Get("chatRange", 280) * 4,
+        }
+    }
+
+    for phoneChatCommand, commandSettings in pairs(phoneChatCommands) do
+        ix.command.Add(phoneChatCommand, {
+            alias = commandSettings.alias,
+            description = commandSettings.description,
+            arguments = ix.type.text,
+            privilege = "Use Phones",
+            OnRun = function(self, client, message)
+                local character = client:GetCharacter()
+                if (!istable(character)) then
+                    return
+                end
+                if (character:GetLandlineConnection().active) then
+                    local recvs = ix.phone.switch:GetCharacterActiveListeners(character)
+                    if (!recvs) then
+                        recvs = {}
+                    end
+
+                    local eavesDropRecvs = ix.phone.switch.endpoints:GetPlayersInRadiusFromPos(
+                            client:GetPos(), commandSettings.range)
+
+                    if (istable(eavesDropRecvs)) then
+                        table.Add(recvs, eavesDropRecvs)
+                    end
+
+                    -- doing this here because, for some reason, chat CanHear just isn't working
+                    -- "If you want it done right, do it yourself"
+                    ix.chat.Send(client, phoneChatCommand, message, false, recvs)
+                end
+            end
+        })
+    end
+end
+
+do
+    -- used to simulate a distortion effect on certain letters when using phoneyell
+    local chatDistortionChars = {
+        O = "Ő̸̗",
+        F = "F̸̲̂̉ ̷̖̇̀",
+        P = "P̵̧̝̫̘͛͜F̶̆̃ ̴̩̫̎̌͜͝ ̴͈̈́",
+        CK =  "C̴̣̖̕͜K̵̘̲͂̈́",
+        K = "K̵̘̲͂̈́",
+        T = "T̸̮͒͝͝",
+        X = "Ẍ̷̻́_̷̛̰",
+        SH =  "S̷̥̓ ̶̖͂Ḣ̴̗ ̴̘̔",
+        Z = "Z̶̗̒̃̅",
+        S = "S̶͖̐̿ ̷̤̰͂͌",
+        H = " ̵̬̻͇̎ ̵͈̦͍̔̅̊̇͝H"
+    }
+    -- TODO: get atle to add a real icon for this to willardcuntent
+    local chatIcon = ix.util.GetMaterial("willardnetworks/chat/message_icon.png")
+    local chatSettings = {
+        phonewhisper = {
+            range = ix.config.Get("chatRange", 280) / 4,
+            color = Color(149, 196, 215),
+            indicator = "chatWhispering",
+            format = "[PHONE] %s: (whisper) \"%s\""
+        },
+        phonesay = {
+            range = ix.config.Get("chatRange", 280),
+            color = Color(105, 157, 178),
+            indicator = "chatTalking",
+            format = "[PHONE] %s: \"%s\""
+        },
+        phoneyell = {
+            range = ix.config.Get("chatRange", 280) * 4,
+            color = Color(166, 89, 89),
+            indicator = "chatYelling",
+            format = "[PHONE] %s: \"%s\""
+        }
+    }
+
+    for chatType, chatTypeData in pairs(chatSettings) do
+        ix.chat.Register(chatType, {
+            color = chatTypeData.color,
+            indicator = chatTypeData.indicator,
+            format = chatTypeData.format,
+            CanSay = function(self, speaker, text)
+                return speaker:GetCharacter():GetLandlineConnection()["active"]
+            end,
+            OnChatAdd = function(self, speaker, text, anonymous, data)
+                local name = anonymous and
+				    L"someone" or
+                    hook.Run("GetCharacterName", speaker, "ic") or
+				    (IsValid(speaker) and speaker:Name() or "Console")
+
+                local rText = ix.chat.Format(text)
+                if (chatType == "phoneyell") then
+                    rText = rText:upper()
+                    for char, repl in pairs(chatDistortionChars) do
+                        rText = rText:gsub(tostring(char), tostring(repl))
+                    end
+
+                    -- ix.chat.Format() will always add punctuation. 
+                    -- Replace that with an exclamation mark for greater effect :)
+                    rText = rText:sub(1, -2)
+                    rText = rText.."!"
+                end
+                rText = string.format(chatTypeData.format, name, rText)
+
+                if (ix.option.Get("standardIconsEnabled")) then
+                    chat.AddText(chatIcon, self.color, rText)
+                else
+                    chat.AddText(self.color, rText)
+                end
+            end
+        })
+    end
+end
+
+do
+    -- dial statuses which will be displayed on the target phone's derma
+    ix.phone.switch.DialStatus = {
+        SourceNotExist = "Err #186A0:>\n Source does not exist as a destination.\n Is it registered in the PSTN?",
+        NoDialSeq = "Err #1D4C0:>\n No dial sequence provided.",
+        CannotDecodeDial = "Err #1E078:>\n Invalid dial sequence provided.",
+        NumberNotFound = "Err #1E208:>\n Destination not registered in the PSTN;\n Cannot find a route.",
+        EndpointNotFound = "Err #1E23A:>\n Route exists, but is missing a valid endpoint;\n Cannot reach endpoint.",
+        DebugMode = "Entering debug mode.",
+        Success = "Connection established.",
+        LineBusy = "Line busy. Please try again later",
+        NotSetup = "Err #1E240:>\n Cannot establish connection.\n Please verifiy connection to PBX."
+    }
+end

gamemodes/ixhl2rp/plugins/phone/sv_hooks.lua

@@ -0,0 +1,147 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+local PLUGIN = PLUGIN
+
+util.AddNetworkString("BeginDialToPeer")
+util.AddNetworkString("ixConnectedCallStatusChange")
+util.AddNetworkString("RunHangupLandline")
+util.AddNetworkString("RunGetPeerName")
+util.AddNetworkString("OnGetPeerName")
+util.AddNetworkString("LineTestChat")
+util.AddNetworkString("LineStatusUpdate")
+util.AddNetworkString("LandlineKeyPress")
+
+net.Receive("LandlineKeyPress", function (len, client)
+    local ent = Entity(net.ReadInt(17))
+    if (ent and ent.inUseBy == client and ent.ButtonPress) then
+        ent:ButtonPress()
+    end
+end)
+
+net.Receive("BeginDialToPeer", function (len, client)
+    local dialSeq = net.ReadString()
+    if (string.len(dialSeq) < 3 or string.len(dialSeq) > 4 or tonumber(dialSeq) == nil) then
+        return
+    end
+
+    local exchange = net.ReadInt(5)
+    local extension = net.ReadInt(11)
+    local character = client:GetCharacter()
+    local vars = character:GetLandlineConnection()
+
+    -- verify that this is coming from the correct place (or that no one is trying to manually call the hook)
+    if (vars["exchange"] != exchange and vars["extension"] != extension) then
+        return
+    end
+
+    local status = ix.phone.switch:Dial(exchange, extension, dialSeq)
+    if (status) then
+        net.Start("LineStatusUpdate")
+            net.WriteString(status)
+        net.Send(client)
+
+        if (status != ix.phone.switch.DialStatus.Success and
+            status != ix.phone.switch.DialStatus.DebugMode) then
+            net.Start("ixConnectedCallStatusChange")
+                net.WriteBool(true)
+                net.WriteBool(false)
+            net.Send(client)
+        end
+    end
+end)
+
+net.Receive("RunHangupLandline", function (len, client)
+    PLUGIN:runHangupOnClient(client)
+end)
+
+net.Receive("RunGetPeerName", function (len, client)
+    if (!client or !IsValid(client)) then
+        return
+    end
+
+    local char = client:GetCharacter()
+    local charMD = char:GetLandlineConnection()
+
+    if (charMD.active) then
+        if (!charMD.extension or !charMD.exchange) then
+            return
+        end
+
+        recievers = ix.phone.switch:GetReceivers(charMD.exchange, charMD.extension)
+        if (!recievers or #recievers < 1) then
+            return
+        end
+
+        net.Start("OnGetPeerName")
+            net.WriteString(recievers[1]["name"])
+        net.Send(client)
+    end
+end)
+
+function PLUGIN:runHangupOnClient(client)
+    if (!client or !IsValid(client)) then
+        return
+    end
+    local data = {}
+        data.start = client:GetShootPos()
+        data.endpos = data.start + client:GetAimVector() * 96
+        data.filter = client
+    local target = util.TraceLine(data).Entity
+
+    if (!target or target.PrintName != "Landline Phone") then
+        return
+    end
+
+    target:HangUp()
+end
+
+-- PHONE CLEANUP
+-- this function literally just dumps all current ongoing connections that happen to have this client in them
+local function cleanupActivePhoneConnectionsForClient(client)
+    if (!client or !IsValid(client)) then
+        return
+    end
+
+    local char = client:GetCharacter()
+    local charCallMD = nil
+    -- why do I have to do all this checking?? UGH thanks helix
+    if (char and char.GetLandlineConnection) then
+        charCallMD = char:GetLandlineConnection()
+    end
+    if (istable(charCallMD) and charCallMD["active"]) then
+        ix.phone.switch:DisconnectActiveCallIfPresentOnClient(client)
+    end
+
+    if (char) then
+        char:SetLandlineConnection({
+            active = false,
+            exchange = nil,
+            extension = nil
+        })
+    end
+end
+
+-- peak laziness:
+function PLUGIN:PlayerDisconnected(client)
+    cleanupActivePhoneConnectionsForClient(client)
+end
+
+function PLUGIN:OnCharacterFallover(client, entity, bFallenOver)
+    cleanupActivePhoneConnectionsForClient(client)
+end
+
+function PLUGIN:PlayerDeath(client)
+    cleanupActivePhoneConnectionsForClient(client)
+end
+
+function PLUGIN:PlayerLoadedCharacter(client, character, lastChar)
+    cleanupActivePhoneConnectionsForClient(client)
+end

gamemodes/ixhl2rp/plugins/phone/sv_plugin.lua

@@ -0,0 +1,49 @@
+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+ix.phone = ix.phone or {}
+ix.phone.switch = ix.phone.switch or {}
+
+local PLUGIN = PLUGIN
+
+function PLUGIN:RegisterSaveEnts()
+    ix.saveEnts:RegisterEntity("landline_phone", true, true, true, {
+        OnSave = function(entity, data) --OnSave
+            data.endpointID = entity.endpointID
+            data.extension  = entity.currentExtension
+            data.exchange   = entity.currentPBX
+            data.name       = entity.currentName
+        end,
+        OnRestore = function(entity, data) --OnRestore
+            local exID      = tonumber(data.exchange)
+            local ext       = tonumber(data.extension)
+            local name      = data.name
+            if (!exID or !ext) then
+                ErrorNoHalt("Landline save data missing endpoint or extension. Ext: "..tostring(ext).." Pbx: "..tostring(exID))
+                return
+            end
+
+            local newEndID = ix.phone.switch.endpoints:Register(entity)
+            if (!newEndID) then
+                -- ent exists already as an endpoint
+                ErrorNoHalt("Landline multiply registered as endpoint! EndID: "..tostring(newEndID))
+                return
+            end
+            entity.endpointID = newEndID
+
+            ix.phone.switch:AddExchange(exID)
+            ix.phone.switch:AddDest(exID, ext, name, newEndID)
+
+            entity.currentExtension = ext
+            entity.currentPBX = exID
+            entity.currentName = name
+        end
+    })
+end