# Ericsson 688/888

UNKNOWN CONNECTOR

Pin | 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

Contributor: | Joakim Ögren

Source: | Ericsson 688/888 pinout at Technick.net

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Document last modified: 2002-01-10