RECOVERY OF ESTABLISHED EMERGENCY CALLS

摘要

A system, method and apparatus for re-establishing a call received at a public safety answering point are described. A Session Initiation Protocol (SIP) call establishment request is received at an emergency call answer node. The call establishment request has an indication of a previously established emergency call to re-establish. The emergency call answer node checks a call recovery queue for a previously received call establishment request having a matching indication for the previously established emergency call to re-establish. The emergency call answer node bridges a call leg for the received call establishment request and a call leg for the previously received call establishment request having the matching indication for the previously established emergency call to re-establish when a match is found.