| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 2 | M | Shield | Shield |
| | | |
| 3 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 4 | E/A | Diagnostic link RXD | Basic interface, telephone |
| | | |
| 5 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 6 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 7 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 8 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 9 | | Not used | |
| | | |
| 10 | E | Voltage supply terminal R | Basic interface, telephone |
| | | |
| 11 | M | Ground | Basic interface, telephone |
| | | |
| 12 | E | Night light signal | Basic interface, telephone |
| | | |
| 13 | | Not used | |
| | | |
| 14 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 15 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 16 | E/A | Diagnostic link TXD | Basic interface, telephone |
| | | |
| 17 | | Not used | |
| | | |
| 18 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 19 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 20 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 21 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 22 | | Not used | |
| | | |
| 23 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 24 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 25 | E/A | Jabit internal | Basic interface, telephone |
| | | |
| 26 | | Not used | |
| | | |