| 摘要 |
The present invention relates to an apparatus implementing a SIGTRAN protocol comprising an NIF device coupled between an SS7 network and an IP network. If the NIF device receives messages of MTP2/MTP3/SCCP from the SS7 network, the NIF device defines the types of messages by reading integer values inserted in the messages of MTP2/MTP3/SCCP and simultaneously performs respective primitive conversion functions corresponding to the types of the messages. If the NIF device receives messages of M2UA/M3UA/SUA from the IP network, the NIF device defines the types of messages by reading a common message header contained commonly in the messages of M2UA/M3UA/SUA, performs primitive conversion functions corresponding to the types of messages and transmits the primitives to the SS7 network. The NIF device can be used for all the layers. In accordance with the present invention, it is possible to solve troublesome problems in establishing respective NIF devices for all the layers and expand the flexibility of the software.
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