| 摘要 |
<p>A method and gateway for cross-gateway self-exchange based on Session Initiation Protocol (SIP) are provided in the present invention. The method includes: configuring a number matching table of the related gateways for the calling gateway (S101); when the communication between the access network in which the calling gateway is located and the core network is interrupted and the called number does not belong to the users of the calling gateway, performing, according to the number matching table, the self-exchange call service between the calling gateway and the related gateway through the SIP signaling (S102). In the present invention, the cross-gateway self-exchange service is configured for the access gateways of different manufacturers; once the communication between the core network and the upward service interface of the access network is interrupted, each access gateway can switch to the self-exchange state automatically; not only the self-exchange call service inside the access gateway can be implemented, but also the cross-gateway self-exchange call service among the access gateways can be implemented if the access gateway can communication with other access gateways in the local area network segment; therefore the network resource can be utilized to the maximum extent to ensure the basic communication service among the gateways.</p> |
