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Old 05-03-2021, 06:20 AM
somer10 somer10 is offline
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Join Date: Oct 2016
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Analysis: all calls were picked up immediately by the mobile phone so no delayed media should be present.All calls were made from same user to the same mobile phone
When a DECT phone calls out to a mobile phone we have 3 possible scenarios:
  1. Scenario1: Call is good
  2. Scenario2: Call is bad:
    dect phone dials out -> mobile phone immediately takes the call. DECT phone keeps hearing ringback tone for +30seconds even though the mobile phone has already taken the call. The mobile phone does not hear anything. After 30 seconds the media path is established and we have 2way audio.
  3. Scenario3:Call is bad:
    same scenario but after 30 seconds we receive a 408 request timeout from the provider and the call is dropped.
Below are the call scenarios from left to right (scenario 1-2-3)
  • S1: good call: pbx receives 183, pbx send media after it.
  • S2: bad call: pbx receives 183,pbx does not send media after the 183. pbx receives an update from provider but pbx does not respond to it. After 30 seconds the pbx receives an 200OK answer on the initial invite and the media is being send in both directions
  • S3: bad call: pbx receives 183,pbx does not send media after the 183. pbx receives an update from provider but pbx does not respond to it. After 30 seconds the pbx receives 408 request terminated from the provider.

Last edited by somer10; 05-03-2021 at 06:24 AM.
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