| 摘要 |
A method for acquiring the transmission path of the SIP message includes the following steps: the caller initiates the test calling and encapsulates the path information request symbol, which represents the request for the callee to return the transmission path information of SIP message, in the calling request information; after receiving the calling request information, the callee encapsulates all of or some of the calling request information in the successful response and returns the successful response information to the caller; the caller acquires the transmission path of the calling request information according to the received successful response information. A system and a network node device for acquiring the transmission path of SIP message are provided. The method, system and the device make the caller acquire the path which the calling request information traverses in the network, and provide the necessary information for the setting of domain routing policy and the active maintenance for the provider.
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