NGN could provide more abundant operations than PSTN network, and could also realize amalgamation of many networks.
NGN能比原有的PSTN网络提供更加丰富的业务能力，并且能够实现多网的融合。
NGN could provide more abundant operations than PSTN network, and could also realize amalgamation of many networks.
NGN能比原有的PSTN网络提供更加丰富的业务能力，并且能够实现多网的融合。
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