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Bug #5177

open

respect dynamic RTP payload types of external SIP

Added by laforge almost 3 years ago. Updated over 1 year ago.

Status:
New
Priority:
Normal
Assignee:
Target version:
-
Start date:
06/12/2021
Due date:
% Done:

0%

Resolution:
Spec Reference:

Description

As keith reported in OsmoDevCall on June 11, when an external SIP entity sends a SIP INVITE with SDP for AMR using a dynamic PT, osmo-sip-connector still sends AMR audio using a different (actually unassigned for this call/session) PT.

I guess this relates to the fact that 3GPP uses "pseudo static" PTs for the different codecs, i.e. it has defined that certain PT numbers from the dynamic PT range actually statically represent 3GPP codec types. Within Osmocom, we are sticking to the latter and may not have considered "Real" SIP/SDP compatibilty on the external interface.


Related issues

Related to osmo-sip-connector - Bug #3724: Wrong media format used in SIP INVITE causes one-way audioNew12/11/2018

Actions
Related to osmo-sip-connector - Bug #1683: osmo-sip-connector: Implement codec selection / move codec selection to osmo-mscStalledneels03/31/2016

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