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progress_timeout

Created by Ryan Harris, last modified on 2018.02.07

progress_timeout‚Äč

integer This is the maximum time we will wait before we get media (whether it's early media, ringing or answer) e.g. maximum PDD before abandoning the route -- the time from Sending the INVITE to receiving the first ringing response for example: a SIP/2.0 180 Ringing or 183. Typical fixed lines have a PDD of under 3 seconds, and mobiles of under 8 seconds.

I set my progress_timeout to 13 seconds to accommodate for slow-setup mobile connections, however, it can probably be shorter. -- Avi Marcus

Two scenarios:

  1. If a carrier is having issues with their platform, all calls might timeout.
  2. If it's not a carrier issue -- if a single carrier timed out at 13 seconds and the user actually waited, the call rarely connected via any other carrier (although they all expired at 13 seconds).

See also: Early Media

Usage

<action application="set" data="progress_timeout=20"/>