| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 2 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 3 | | Not used | |
| | | |
| 4 | | Not used | |
| | | |
| 5 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 6 | | Not used | |
| | | |
| 7 | | Not used | |
| | | |
| 8 | | Not used | |
| | | |
| 9 | M | Shield | Shield Navigation |
| | | |
| 10 | A | Communication line data link RXD | Navigation control module |
| | | |
| 11 | A | Communication line data link TXD | Eject box |
| | | |
| 12 | E | Voltage supply terminal R | Fuse F46 |
| | | |
| 13 | E/A | I-bus signal line | I-bus splice Telephone connector |
| | | |
| 14 | | Not used | |
| | | |
| 15 | | Not used | |
| | | |
| 16 | | Not used | |
| | | |
| 17 | A | Front loudspeaker ground control | Voice input Amplifier Front loudspeaker |
| | | |
| 18 | A | Front loudspeaker voltage control | Voice input Amplifier Front loudspeaker |
| | | |
| 19 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 20 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 21 | | Not used | |
| | | |
| 22 | | Not used | |
| | | |
| 23 | | Not used | |
| | | |
| 24 | M | Ground | Ground splice |
| | | |
| 25 | E | Terminal 30 voltage supply | Fuse F70 |
| | | |
| 26 | | Not used | |
| | | |
| 27 | | Not used | |
| | | |
| 28 | A | Data cable | Navigation control module |
| | | |
| 29 | A | Telephone mute signal | Radio |
| | | |
| 30 | | Not used | |
| | | |
| 31 | E | Terminal 30 voltage supply | Fuse F70 |
| | | |
| 32 | E | Terminal 30 voltage supply | Fuse F70 |
| | | |
| 33 | M | Ground | Ground splice |
| | | |
| 34 | M | Ground | Ground splice |
| | | |
| 35 | | Not used | |
| | | |
| 36 | | Not used | |
| | | |
| 37 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 38 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 39 | M | Shield | Shield |
| | | |
| 40 | | Not used | |
| | | |
| 41 | | Not used | |
| | | |
| 42 | M | Ground | Ground splice |
| | | |
| 43 | E | Terminal 30 voltage supply | Fuse F70 |
| | | |
| 44 | M | Not used | |
| | | |
| 45 | M | Not used | |
| | | |
| 46 | A | Data cable | Navigation control module |
| | | |
| 47 | A | Telephone ON signal | Voice input Amplifier |
| | | |
| 48 | A | Siemens internal | Eject box Tandem telephone |
| | | |
| 49 | | Not used | |
| | | |
| 50 | | Not used | |
| | | |
| 51 | | Not used | |
| | | |
| 52 | A | Negative input signal, microphone | Voice input Microphone |
| | | |
| 53 | M | Shield | Shield Microphone |
| | | |
| 54 | A | Positive input signal, microphone | Voice input Microphone |
| | | |