[asterisk-users] Weird SIP Issue

[Eric Wieling]

We are having a weird problem where calls get cut off in the middle.  I'm not a SIP expert but could the INVITE with an empty SDP be the problem?

|Time     | 209.220.119.18                        |
|         |                   | 208.88.61.150     |                   
|9687.369 |         INVITE SDP (g729 telephone-eventRTPType-101)          |SIP From: <sip:vmax at 209.220.119.18 To:<sip:17329071590 at 208.88.61.150
|         |(5060)   ------------------>  (5060)   |
|9687.390 |         100 Trying|                   |SIP Status
|         |(5060)   <------------------  (5060)   |
|9687.394 |         200 OK SDP (g729 telephone-eventRTPType-101)          |SIP Status
|         |(5060)   <------------------  (5060)   |
|9687.395 |         ACK       |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |
|9687.396 |         INVITE SDP (g729 telephone-eventRTPType-101)          |SIP From: <sip:vmax at 209.220.119.18 To:<sip:17329071590 at 208.88.61.150
|         |(5060)   ------------------>  (5060)   |
|9687.416 |         100 Trying|                   |SIP Status
|         |(5060)   <------------------  (5060)   |
|9687.422 |         200 OK SDP (g729 telephone-eventRTPType-101)          |SIP Status
|         |(5060)   <------------------  (5060)   |
|9687.422 |         ACK       |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |
|9687.630 |         RTP (g729)                    |RTP Num packets:149  Duration:2.959s SSRC:0x3C4C9C24
|         |(14594)  ------------------>  (12310)  |
|9690.591 |         INVITE SDP (g729 telephone-eventRTPType-101)          |SIP Request
|         |(5060)   <------------------  (5060)   |
|9690.592 |         100 Trying|                   |SIP Status
|         |(5060)   ------------------>  (5060)   |
|9690.592 |         200 OK SDP (g729 telephone-eventRTPType-101)          |SIP Status
|         |(5060)   ------------------>  (5060)   |
|9690.610 |         RTP (g729)                    |RTP Num packets:35400  Duration:707.979s SSRC:0x3C4C9C24
|         |(14594)  ------------------>  (12310)  |
|9690.611 |         ACK       |                   |SIP Request
|         |(5060)   <------------------  (5060)   |
|10398.610|         RTP (g729)                    |RTP Num packets:1  Duration:0.000s SSRC:0x6260DF4F
|         |(14594)  ------------------>  (12310)  |
|10398.702|         INVITE SDP ()                 |SIP From: <sip:vmax at 209.220.119.18 To:<sip:17329071590 at 208.88.61.150
|         |(5060)   ------------------>  (5060)   |
|10398.719|         488 Not acceptable here          |SIP Status
|         |(5060)   <------------------  (5060)   |
|10398.719|         ACK       |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |
|10398.720|         INVITE SDP (g729 telephone-eventRTPType-101)          |SIP From: <sip:vmax at 209.220.119.18 To:<sip:17329071590 at 208.88.61.150
|         |(5060)   ------------------>  (5060)   |
|10398.740|         100 Trying|                   |SIP Status
|         |(5060)   <------------------  (5060)   |
|10398.746|         200 OK SDP (g729 telephone-eventRTPType-101)          |SIP Status
|         |(5060)   <------------------  (5060)   |
|10398.746|         RTP (g729)                    |RTP Num packets:1  Duration:0.000s SSRC:0x468D9F03
|         |(14594)  <------------------  (12310)  |
|10398.746|         ACK       |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |
|10398.746|         BYE       |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |
|10398.763|         200 OK    |                   |SIP Status
|         |(5060)   <------------------  (5060)   |