invalid sdp

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Hello all,

 

I have an SDP that is being rejected by PJSUA. See error message:

 09:47:18.250      sip_inv.c  Error parsing/validating SDP body: Invalid SDP
payload type in media line (PJMEDIA_SDP_EINPT)
 09:47:18.250   pjsua_call.c  Bad SDP in incoming INVITE: Invalid SDP
payload type in media line (PJMEDIA_SDP_EINPT) [status=220033]
 09:47:18.250   pjsua_core.c  TX 425 bytes Response msg 400/INVITE/cseq=1
(tdta0x98854e8) to UDP 192.168.30.122:5060:
SIP/2.0 400 Bad SDP
Via: SIP/2.0/UDP
192.168.30.122:5060;received=192.168.30.122;branch=z9hG4bK90991384-224468
Call-ID: GLPG90991384224467
From: "green995" <sip:green995@192.168.30.122
<mailto:sip%3Agreen995 at 192.168.30.122> >;tag=GLPG_90991384-224469
To: "red005" <sip:red005 at 192.168.
<mailto:sip%3APacketProbe005 at 192.168.30.170>
30.170>;tag=z9hG4bK90991384-224468
CSeq: 1 INVITE
Warning: 399 red "Invalid SDP payload type in media line
(PJMEDIA_SDP_EINPT)"
Content-Length:  0
----------------------------------

The only difference between the rejected SDP and an accepted SDP is as
follows (accepted SDP on top):

a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15

vs

a=rtpmap:196 telephone-event/8000
a=fmtp:196 0-15

Googling the SDP RFC did not shed any light, but when I google rtpmap 101 it
is repeatedly linked to telephone-event where rtpmap 196 is not. So is that
all that is going wrong here? 196 telephone-event/8000 is not valid? Does
anyone know where these standards are defined? Thoughts on how to get PJSUA
to ignore this and accept the SDP (I'm never actually going to use
telephone-event, I only want to use mulaw and g729 - I don't know why
telephone event is even being sent)?

 

 

Thanks,

 

Steven Egan

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