[reSIProcate] SDP Hold question
- From: "Kovar, William \(Bill\)" <bkovar@xxxxxxxxx>
- Date: Tue, 21 Nov 2006 19:12:51 -0500
I have a question
about constructing a Hold SDP. I'm using a eyeBeam and a Grandstream
phone.
In the 2 examples
below, the first re-Invite, (in magenta) is
generated by pressing the Hold button on an active call on the eyeBeam phone.
The audio becomes muted. Pressing Hold again unmutes the call and audio is again
established. This re-Invite sequence is shuffled through my
B2B.
The 2nd re-Invite,
(in green) is generated by my B2B on behalf of the
eyeBeam phone (3rd party call control). Audio becomes garbled and I cannot
reconnect the call. Nothing is sent to the eyeBeam phone.
When constructing
the Hold SDP in the B2B, all I change is the version number in the origin line,
by using the last received SDP (the manual un-Hold by the eyeBeam phone) and
then incrementing the version value in the Origin line.
Is there something
else I need to do?? Do I need to send the answer (220 OK w/SDP) from the
GrandStream phone I receive back to the eyeBeam?
Any
thoughts??
INVITE sip:55504@xxxxxxxxxxxx
SIP/2.0
Via: SIP/2.0/UDP
135.8.116.33:5060;branch=z9hG4bK-d87543-e034f66b151da125-1--d87543-;rport
Max-Forwards: 70
Route:
<sip:135.8.52.181:5060;lr>
Contact:
<sip:55123@xxxxxxxxxxxx:5060>
To:
<sip:55504@xxxxxxxxx>;tag=4e7d7140a8da0070
From: "IC 7.1
B2B"<sip:55123@xxxxxxxxx>;tag=00763b3d
Call-ID:
9d476254395d7709ZTU2NTMzOTg2ZDMyYzc4MWNiYjc4MzMzMGUwNGJkYWM.
CSeq: 3 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS,
BYE, NOTIFY
Content-Type:
application/sdp
Proxy-Authorization: Digest
username="55123",realm="avaya.com",nonce="MTE2NDE1NzE0NjpTREZTZXJ2ZXJTZWNyZXRLZXk6Mjc5NTYwOTY2",uri="sip:55504@xxxxxxxxxxxx",response="e3aca7e0119f70949d78173fc72e446a",algorithm=MD5
User-Agent: AVSipSwitch
1.02b-1
Content-Length: 177
v=0
o=- 17377554 17383243 IN IP4
135.8.116.157
s=eyeBeam
c=IN IP4 135.8.116.157
t=0 0
m=audio 7478 RTP/AVP 0
a=alt:1 1 : 79B29E65 00000006
135.8.116.157 7478
a=sendonly
INVITE sip:55504@xxxxxxxxxxxx
SIP/2.0
Via: SIP/2.0/UDP
135.8.116.33:5060;branch=z9hG4bK-d87543-915302260a54c071-1--d87543-;rport
Max-Forwards: 70
Route:
<sip:135.8.52.181:5060;lr>
Contact:
<sip:55123@xxxxxxxxxxxx:5060>
To:
<sip:55504@xxxxxxxxx>;tag=4e7d7140a8da0070
From: "IC 7.1
B2B"<sip:55123@xxxxxxxxx>;tag=00763b3d
Call-ID:
9d476254395d7709ZTU2NTMzOTg2ZDMyYzc4MWNiYjc4MzMzMGUwNGJkYWM.
CSeq: 5 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS,
BYE, NOTIFY
Content-Type:
application/sdp
Proxy-Authorization: Digest
username="55123",realm="avaya.com",nonce="MTE2NDE1NzE0NjpTREZTZXJ2ZXJTZWNyZXRLZXk6Mjc5NTYwOTY2",uri="sip:55504@xxxxxxxxxxxx",response="e3aca7e0119f70949d78173fc72e446a",algorithm=MD5
User-Agent: AVSipSwitch
1.02b-1
Content-Length: 177
v=0
o=- 17377554 17385540 IN IP4
135.8.116.157
s=eyeBeam
c=IN IP4 135.8.116.157
t=0 0
m=audio 7478 RTP/AVP 0
a=alt:1 1 : 79B29E65 00000006
135.8.116.157 7478
a=sendonly
Bill Kovar
Avaya, Inc.
(732) 852-2609