[OpenSIPS-Users] Double SDP

[Alexey Vasilyev]

This is absolutely normal. SDP can contain both RTP/AVP and RTP/SAVP. This is
Invite from snom phone, for example:

Sent to tls:135.42.212.82:5061 at Sep 4 14:19:18.641 (1383 bytes):

INVITE sip:*7 at sip.test.dk SIP/2.0
Via: SIP/2.0/TLS 172.16.1.29:4169;branch=z9hG4bK-gci2vl6fe7cz;rport
From: "Demo" <sip:200 at sip.test.dk>;tag=ncsplp1nvz
To: <sip:*7 at sip.test.dk>
Call-ID: 313536373539393535363232353137-eewp9wlm45rf
CSeq: 2 INVITE
Max-Forwards: 70
User-Agent: snom320/8.7.5.44
Contact: <sip:200 at 172.16.1.29:4169;transport=tls>;reg-id=1
X-Serialnumber: 000XXX
P-Key-Flags: keys="3"
Accept: application/sdp
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK,
MESSAGE, INFO, UPDATE
Allow-Events: talk, hold, refer, call-info
Supported: timer, 100rel, replaces, from-change
Session-Expires: 600
Min-SE: 90
Authorization: Digest
username="200",realm="asterisk",nonce="7b2d56ec",uri="sip:*7 at sip.test.dk",response="7a9fe1f24a6f7585fb7323237a000167",algorithm=MD5
Content-Type: application/sdp
Content-Length: 476

v=0
o=root 558099897 558099897 IN IP4 172.16.1.29
s=call
c=IN IP4 172.16.1.29
t=0 0
m=audio 60812 RTP/SAVP 9 8 101
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:ysn2nTlXXXXXXAuZYcpOhf1g/h+oG
a=rtpmap:9 G722/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
m=audio 60812 RTP/AVP 9 8 101
a=rtpmap:9 G722/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv





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Alexey Vasilyev
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Sent from: http://opensips-open-sip-server.1449251.n2.nabble.com/OpenSIPS-Users-f1449235.html