| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 2 | M | Shield | Ground connector Shield |
| | | |
| 3 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 4 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 5 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 6 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 7 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 8 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 9 | | Not used | |
| | | |
| 10 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 11 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 12 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 13 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 14 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 15 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 16 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 17 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |
| 18 | E/A | JA-BIT internal | Basic interface, telephone |
| | | |