1)  interexchange carrier
局间载波
2)  interoffice telephone trunk
局间中继
3)  trunk channel
局间信道
1.
Compared with the traditional concentrated conference bridge,it can reduce the utilization of the trunk channel resource and expand the capacity of the conference bridge in some application case.
提出了分布式会议桥的思路,与传统的集中式会议桥相比,在某些应用场合下可减少电话会议局间信道资源占用量,并可扩展会议桥的容量。
4)  interoffice signaling
局间指令
5)  Interoffice trunk
局间中继线
6)  bureaufax
[公用]局间传真
参考词条
补充资料：电力线载波保护复用载波机


电力线载波保护复用载波机
multi purpose PLC equipment for teleprotection system

d一onl一x一on zolbo boohu fuyong 20一boJ-电力线载波保护复用载波机(multi purposePLC equiPment for teleProteetion system)见电力线载波机。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。