Hello,
we are using an SPA122 behind an asterisk 1.8 pbx with t.38 pathtrough to our sip provider qsc which offers t.38. Some faxes are successful with t.38 and some not. I did an trace with wireshark and can see that when faxes are unsuccessfull i get back an error like 488 not acceptable here. When i merge the 2 logs i can see that after the t.38 invite the successfull call sends an additional 19.183286| 200 OK SDP (t38) to our provider.
May someone knows this problem and what causes this? Here are the 2 logs from such calls:
Successfull call
|Time | 213.148.136.178 |
| | | 10.168.72.10 |
|3.543586 | INVITE SDP (g711A g7 |SIP From: <sip:07819482210
@qsc.de;user=phone To:<sip:
0781968259901
@qsc.de;user=phone
| |(5060) ------------------> (5060) |
|3.549397 | 100 Trying| |SIP Status
| |(5060) <------------------ (5060) |
|4.220805 | 180 Ringing |SIP Status
| |(5060) <------------------ (5060) |
|13.386083| 200 OK SDP (g711A te |SIP Status
| |(5060) <------------------ (5060) |
|13.635983| 200 OK SDP (g711A te |SIP Status
| |(5060) <------------------ (5060) |
|13.688985| RTP (g711A) |RTP Num packets:243 Duration:5.420s SSRC:0xE4C418E1
| |(57438) ------------------> (10016) |
|13.740007| ACK | |SIP Request
| |(5060) ------------------> (5060) |
|19.029958| INVITE SDP (t38) |SIP Request
| |(5060) <------------------ (5060) |
|19.042574| 100 Trying| |SIP Status
| |(5060) ------------------> (5060) |
|19.183286| 200 OK SDP (t38) |SIP Status
| |(5060) ------------------> (5060) |
|19.183718| ACK | |SIP Request
| |(5060) <------------------ (5060) |
|30.212726| v21-preamble |t38:t30 Ind:v21-preamble
| |(57438) ------------------> (10100) |
|31.969429| TSI Num:
+49 781 932
|t38:v21:HDLC:Transmitting Subscriber Identification
| |(57438) ------------------> (10100) |
|32.233245| NSF | |t38:v21:HDLC:Non-Standard Facilities
| |(57438) ------------------> (10100) |
|32.609155| v29-9600-training |t38:t30 Ind:v29-9600-training
| |(57438) ------------------> (10100) |
|32.809153| t4-non-ecm-data:v29- |t38:t4-non-ecm-data:v29-9600 Duration: 1,56s Pack lost: 2, Pack burst lost: 1
| |(57438) ------------------> (10100) |
|37.609350| v29-9600-training |t38:t30 Ind:v29-9600-training
| |(57438) ------------------> (10100) |
|37.809539| t4-non-ecm-data:v29- |t38:t4-non-ecm-data:v29-9600 Duration: 11,52s Pack lost: 53, Pack burst lost: 6
| |(57438) ------------------> (10100) |
|49.449244| v21-preamble |t38:t30 Ind:v21-preamble
| |(57438) ------------------> (10100) |
|50.609650| EOP | |t38:v21:HDLC:End Of Procedure
| |(57438) ------------------> (10100) |
|53.169161| v21-preamble |t38:t30 Ind:v21-preamble
| |(57438) ------------------> (10100) |
|54.409349| EOP | |t38:v21:HDLC:End Of Procedure
| |(57438) ------------------> (10100) |
|55.106814| INVITE SDP (g711A te |SIP From: <sip:
07819482210
@qsc.de;user=phone To:<sip:
0781968259901
@qsc.de;user=phone
| |(5060) ------------------> (5060) |
|55.107302| 100 Trying| |SIP Status
| |(5060) <------------------ (5060) |
|55.107494| 200 OK SDP (g711A te |SIP Status
| |(5060) <------------------ (5060) |
|55.129275| RTP (g711A) |RTP Num packets:41 Duration:0.799s SSRC:0xE4C418E1
| |(57438) ------------------> (10016) |
|55.160900| ACK | |SIP Request
| |(5060) ------------------> (5060) |
|55.888121| BYE | |SIP Request
| |(5060) <------------------ (5060) |
|55.940529| 200 OK | |SIP Status
| |(5060) ------------------> (5060) |
And the unsuccessfull call:
|Time | 213.148.136.178 |
| | | 10.168.72.10 |
|14.718690| INVITE SDP (g711A g7 |SIP From: <sip:07811255970
@qsc.de;user=phone To:<sip:
0781968259901
@qsc.de;user=phone
| |(5060) ------------------> (5060) |
|14.723469| 100 Trying| |SIP Status
| |(5060) <------------------ (5060) |
|15.338857| 180 Ringing |SIP Status
| |(5060) <------------------ (5060) |
|24.459486| 200 OK SDP (g711A te |SIP Status
| |(5060) <------------------ (5060) |
|24.648135| RTP (g711A) |RTP Num packets:270 Duration:5.939s SSRC:0x6DFA6884
| |(57436) ------------------> (10040) |
|24.708860| 200 OK SDP (g711A te |SIP Status
| |(5060) <------------------ (5060) |
|24.714819| ACK | |SIP Request
| |(5060) ------------------> (5060) |
|24.721217| ACK | |SIP Request
| |(5060) ------------------> (5060) |
|30.099566| INVITE SDP (t38) |SIP Request
| |(5060) <------------------ (5060) |
|30.112983| 100 Trying| |SIP Status
| |(5060) ------------------> (5060) |
|30.329768| 488 Not Acceptable H |SIP Status
| |(5060) ------------------> (5060) |
|30.330026| ACK | |SIP Request
| |(5060) <------------------ (5060) |
|30.330315| INVITE SDP (g711A te |SIP Request
| |(5060) <------------------ (5060) |
|30.579764| INVITE SDP (g711A te |SIP Request
| |(5060) <------------------ (5060) |
|30.592302| 200 OK SDP (g711A g7 |SIP Status
| |(5060) ------------------> (5060) |
|30.592763| ACK | |SIP Request
| |(5060) <------------------ (5060) |
|30.608858| RTP (g711A) |RTP Num packets:2113 Duration:45.384s SSRC:0x6DFA6884
| |(57436) ------------------> (10040) |
|75.935329| BYE | |SIP Request
| |(5060) <------------------ (5060) |
|76.184602| BYE | |SIP Request
| |(5060) <------------------ (5060) |
|76.196643| 200 OK | |SIP Status
| |(5060) ------------------> (5060) |
Thanks alot for your help.
