CTEL Connector Connector End View
CTEL CONNECTOR
| CAV | CIRCUIT | FUNCTION |
| 1 | 18BR | GROUND |
| 4 | 16DG/YL/BK | RADIO MUTE |
| 7 | 18BL/DG | SPEAKER-LEFT FRONT (-) CTEL |
| 9 | 10BR | CTEL CONNECTOR CAV 9 TO MICROPHONE CONNECTOR CAV 1 |
| 10 | 18BK/BL | FUSED OPTIONAL EQUIPMENT RELAY OUTPUT |
| 11 | 18RD/BK/WT | FUSED B(+) |
| 12 | 18BK/BL | FUSED OPTIONAL EQUIPMENT RELAY OUTPUT |
| 16 | 18BK/YL | SPEAKER-LEFT FRONT (+) CTEL |
| 18 | 10BL | CTEL CONNECTOR CAV 18 TO MICROPHONE CONNECTOR |