Pin |
Name |
Description |
1 |
GND |
Digital ground |
2 |
MIC/JCONN |
External audio input from accessories or handsfree microphone. Multiplexed with junction box connection control signal |
3 |
AGND |
Analogue ground for accessories |
4 |
TDA |
Transmitted DBUS data to the accessories |
5 |
M2BUS |
Serial Bidirectional data and control between the handportable and accessories |
6 |
HOOK/RXD2 |
Hook indication. HP has a 100KE pull-up resistor |
7 |
PHFS/TXD2 |
Handsfree device power on/off, data to flash programming device |
8 |
VCHAR |
Battery charging voltage |
9 |
GND |
Digital ground |
10 |
EAR/HFPWR |
External Audio output to accessories or handsfree speaker |
11 |
DSYNC |
DBUS data bit sync clock |
12 |
RDA |
DBUS recieved data from the accessories |
13 |
BENA |
Power supply to headset adapter |
14 |
VF |
Programming voltage for FLASH |
15 |
DCLK |
DBUS data clock |
16 |
VCHAR |
Battery charging voltage |