1. ACLI Configuration Guide
  2. Local Media Playback
  3. Supported Playback Scenarios
  4. Playback on 183 Session Progress

Playback on 183 Session Progress

This scenario is triggered by setting the SPL options parameter to either playback-on-183-to-originator or playback-on-183-from-terminator in realms, session agents, or SIP interfaces. When both options trigger, playback-on-183-to-originator takes precedence. This scenario triggers only for 183 Session Progress responses to initial INVITEs, not for re-INVITEs.

  • playback-on-183-to-originator—Starts playback upon the receipt of a 183 Session Progress destined for the originator and stops when a either a (200-299 or 400-699) final response is sent. When you configure this option, every call sent from the originator triggers this playback.
  • playback-on-183-from-terminator—Starts playback upon the receipt of a 183 Session Progress response is received from the terminator and stops when a (200-299 or 400-699) final response is received. When you configure this option, every call sent to the terminator triggers this playback.
Logic diagram on the effect of the playback-on-183-to-originator and playback-on-183-from-terminator settings being enabled.

A call flow for the playback-on-183-from-terminator scenario looks like this:

Call flow depicting the playback-on-183-from-terminator setting being enabled.