It is also evident that a large number of IP based services (such as Presence or IM) simply cannot be interconnected using a SS7/TDM network, further increasing the need for evolution into an IP based interconnection network.
同时有一点非常明确，大量的基于 IP 的业务（例如在线状态和即时通讯）无法使用一个 SS7/TDM 网络来实现网间互联，更进一步地增加了对于演进到一个基于 IP 的网间互联网络的需求。