| 1. | Circuit group unblocking message cgu
电路群解除闭塞消息 |
| 2. | Circuit group blocking request cgb
电路群闭塞的请求 |
| 3. | Circuit group congestion signal cgc
电路群拥塞信号 |
| 4. | Switching circuit group congestion
交换电路群拥塞 |
| 5. | Circuit group monitor message grm
电路群监视消息 |
| 6. | First - choice circuit group
首选电路群 |
| 7. | Circuit group query cqm
电路群询问 |
| 8. | Incoming circuit group
入局电路群 |
