Piedinature - Pinouts
Ericsson T10S T18S A1018S 688 888

12 Pin Ericsson connector
Ericsson connector

Pin	Signal Description
1	+ external power supply (7.2Volt - 600mA)
2	RS232 input (TTL)
3	GND (digital)
4	RS232 output (TTL)
5	+5V output
6	Test. Switch phone off and provide +5V and switch back on. (set comms at 9600, n,8,1)
7	Mute
8	Internal/external mic and ear (0=External - open=Internal)
9	GND (analogic)
10	? Related to Mic/Speak
11	BF in
12	BF out

Piedinature - PinoutsEricsson T10S T18S A1018S 688 888