随着NGN网络在全国的部署，SIP终端的出现，多媒体彩铃在NGN网络中的应用成为可能。
Along with the national deployment of NGN network and the appearance of SIP terminal, the multimedia ring back tone's deployment in NGN network is becoming possible.
随着NGN网络在全国的部署，SIP终端的出现，多媒体彩铃在NGN网络中的应用成为可能。
Along with the national deployment of NGN network and the appearance of SIP terminal, the multimedia ring back tone's deployment in NGN network is becoming possible.
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