This page provides miscellaneous information about how the SBC Edge Portfolio implements the SIP protocol.

Supported SIP Methods

The following SIP methods are supported (declared in the allow header):

  • INVITE
  • UPDATE
  • REFER
  • NOTIFY
  • SUBSCRIBE
  • BYE
  • ACK
  • PRACK

SIP Information

The  supports a REFER message with the Replaces header when two connected calls are in different session control (SC) pods. The SIP creates an OOD INVITE with the Replaces header and sends it back to the SIP Load Balancing (SLB) pod. The SLB pod reads the Replaces header and routes the call to the SC pod where the call with the Replaces header runs. The following call flow outlines a REFER message with the Replaces header.

REFER with Replaces Transfer Call