InterhackerspacePBX/Payphone

The Payphone is a British Telecom Payphone 300

Internally its missing the main logic board and the cash box

Conversion Plan

Pi + usb audio and a sip softphone

Keypad

Its expected the keypad it a standard matrix style that we can connect directly to the pin or via a ATMega chip

LCD

LCD looks to be a 7 segment style, 4 digits

Connections

There are 4 connections internal details of the pins outs can be found below

Main connection 34 pin connector

Pin	Colour	Function	Detail
1	Brown	LCD
2	Red	LCD
3	Orange	LCD
4	Yellow	LCD
5	Green	LCD
6	Blue	LCD
7	Purple	LCD
8	Grey	LCD
9	White	LCD
10	Black	LCD
11	Brown	LCD
12	Red	LCD
13	Orange	LCD
14	Yellow	LCD
15	green	Keypad	PL1
16	Blue	Keypad
17	Purple	Keypad
18	Grey	Keypad
19	White	Keypad
20	Black	Keypad
21	Brown	Keypad	PL7
22	Red	Spare	N/C
23	Orange	Hook
24	Yellow	Hook
25	green	Follow
26	Blue	Follow
27	Purple	Speaker
28	Grey	Speaker
29	White	Spare	N/C
30	Black	Spare	N/C
31	Brown	Spare	N/C
32	Red	Spare	N/C
33	Orange	Spare	N/C
34	Yellow	Spare	N/C

Handset 5 pin connector

This connector is keyed, Pin 2 is blocked out

Pin	Colour	Function	Detail
1	Red	Speaker
2	N/A	Key
3	Blue	Mic
4	Green	Speaker
5	White	Mic

Coin acepter

TBD

Coin holder

TBD