Backend Polling Based on Nonzero SIP Subscribe Expiration

摘要

Methods and computing systems for SIP backend polling based on nonzero SIP subscribe expiration are described. A SIP server receives from a SIP client a Session Initiation Protocol (SIP) subscribe message indicating a nonzero expiration time. Based at least on receipt of the subscribe message indicating a nonzero expiration time, the SIP server initiates a backend polling session to a backend server. The SIP server receives, via the backend polling session, state information and provides the state information to the SIP client.

主权项

1. A computing system comprising:
one or more processors; memory; and one or more program modules stored on the memory and executable by the one or more processors to:
receive from a computing device a Session Initiation Protocol (SIP) subscribe message indicating a nonzero expiration;transmit to a backend server a SIP polling subscribe message, the transmitting based at least on the SIP subscribe message indicating a nonzero expiration;receive state information from the backend server; andprovide the state information to the computing device.