U4 Tandem telephone

Connector overview

NumberX-pin, colorDescription
X176718-pin, BlackConnector Tandem telephone

Pin assignments at connector X1733

PinTypeDescription / Signal typeConnection /
Measuring notes
1ESignal Transceiver/charging electronicsTransceiver/charging electronics
   
2ESignal Transceiver/charging electronicsTransceiver/charging electronics
   
3ESignal Transceiver/charging electronicsTransceiver/charging electronics
   
4ETelephone ON/OFFTransceiver/charging electronics
   
5 Not used 
   
6 Not used 
   
7 Not used 
   
8 Not used 
   
9 Not used 
   
10MVideo shieldShield
   
11 Not used 
   
12 Not used 
   
13 Not used 
   
14 Not used 
   
15ENighttime illumination signalRadio
   
16 Not used 
   
17 Not used 
   
18MGroundTransceiver/charging electronics