Cellular Network Infrastructure » OsmoMGW

In the test I am currently running, it so happens that osmo-msc enables AMR-WB for 3G.
(My testing is about something else entirely, just noting this down now because it caught my attention.)

I see an MDCX to osmo-mgw with AMR and AMR-WB included.
The OK response however only includes AMR, no AMR-WB.

The osmo-mgw log doesn't show any trouble:

Sep 13 23:14:38 arn-testnitb osmo-mgw[46256]: 20230913231438724 DLMGCP NOTICE endpoint:rtpbridge/1@mgw MDCX: modifying existing connection ... (mgcp_protocol.c:1169)
Sep 13 23:14:38 arn-testnitb osmo-mgw[46256]: 20230913231438724 DLMGCP NOTICE endpoint:rtpbridge/1@mgw CI:764B8A8A Got media info via SDP: port:4024, addr:10.9.25.182, duration:20, payload-types:112=AMR 113=AMR-WB  (mgcp_sdp.c:444)
Sep 13 23:14:38 arn-testnitb osmo-mgw[46256]: 20230913231438724 DLMGCP NOTICE endpoint:rtpbridge/1@mgw CI:764B8A8A MDCX: connection successfully modified (mgcp_protocol.c:1372)

Find out why AMR-WB is dropped in the response, and fix.