In this paper, the network architecture of the CMT system is discussed, a distributed MSC architecture in circuit-domain is proposed, then a conception of IP-based A interface is introduced.

• 本文探讨了CMT系统的网络架构，描述了电路域MSC的分布式网络架构，并在此基础上引入了基于IP架构的CMT系统内部A接口也即MSC与BSC之间的信令/业务接口概念。