[Serusers] One way voice Problem

Thu Feb 12 02:38:15 CET 2004

Hi,

I had the same problem. In my case I was testing with one user agent
behind NAT and the other on a real ip. I wonder whether it's the same
situation with you as well.

> Hi,
>
>     I have SER and 2 cisco SIP phones configured. When I call between
> the SIP phones, I can hear voice from only direction (callee to
> caller voice works, caller to callee doesn't work). Both phones
> display connected in their LCD screen and I also checked the codecs
> used by the phones are same. I would appreciate if anyone can point
> me where this gets wrong and what are the possible solutions for
> this problem.
>
>     I have attached the ngrep output below. In the second message of the
> output, I can see a "Warning: 392" header field with a value "Noisy
> Feedback tells:...".
>
>
> ngrep output:
> ------------
>
> interface: eth0 (192.168.6.0/255.255.255.0)
> #############
> #
> U 192.168.6.103:49834 -> 192.168.6.100:5060
>   INVITE sip:3311 at 192.168.6.100 SIP/2.0..Via: SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji"
> <sip:3322 at 192.168.6.100>;tag=925f0b 001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Date: Wed, 11 Feb 2
> 004 18:33:50 GMT..CSeq: 101 INVITE..Expires: 180..User-Agent:
> Cisco-SIP-IP-Phone/2..Accept: application/sdp..Contact:
> sip:3322 at 192.168 .6.103:5060..Content-Type:
> application/sdp..Content-Length:
> 226....v=0..o=CiscoSystemsSIP-IPPhone-UserAgent 26498 14989 IN IP4
> 192.168 .6.103..s=SIP Call..c=IN IP4 192.168.6.103..t=0 0..m=audio
> 27234 RTP/AVP 0 8 18 101..a=rtpmap:0 pcmu/8000..a=rtpmap:101
> telephone-even t/8000..a=fmtp:101 0-11..
> #
> U 192.168.6.100:5060 -> 192.168.6.103:5060
>   SIP/2.0 100 trying -- your call is important to us..Via: SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji" <sip:3322 at 192.168.6.10
> 0>;tag=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..CSeq: 101
> INVITE..Server: Sip EXpress router (0.8.11
> (i386/linux))..Content-Length: 0..Warning: 392 192.168.6.100:5060
> "Noisy feedback tells :  pid=9732 req_src_ip=192.168.6.103
> req_src_port=49834 in_uri=sip:3311 at 192.168.6.100
> out_uri=sip:3311 at 192.168.6.104:5060 via_cnt==1". ...
> #
> U 192.168.6.100:5060 -> 192.168.6.104:5060
>   INVITE sip:3311 at 192.168.6.104:5060 SIP/2.0..Max-Forwards:
> 10..Record-Route:
> <sip:3311 at 192.168.6.100;ftag=925f0b001c0632395f2e8-34ee90e
> ;lr=on>..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.9c3bbf61.0..Via: SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji" <si
> p:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 19 2.168.6.103..Date: Wed, 11 Feb
> 2004 18:33:50 GMT..CSeq: 101 INVITE..Expires: 180..User-Agent:
> Cisco-SIP-IP-Phone/2..Accept: applicatio n/sdp..Contact:
> sip:3322 at 192.168.6.103:5060..Content-Type:
> application/sdp..Content-Length:
> 226....v=0..o=CiscoSystemsSIP-IPPhone-User Agent 26498 14989 IN IP4
> 192.168.6.103..s=SIP Call..c=IN IP4 192.168.6.103..t=0 0..m=audio
> 27234 RTP/AVP 0 8 18 101..a=rtpmap:0 pcmu/8 000..a=rtpmap:101
> telephone-event/8000..a=fmtp:101 0-11..
> #
> U 192.168.6.104:50020 -> 192.168.6.100:5060
>   SIP/2.0 100 Trying..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.9c3bbf61.0,SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji "
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID :
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
> Cisco-SIP-IP-Phone/2..Date: Wed, 11 Feb 2004 18:33:50 GMT..CSeq: 101
> INVI TE..Content-Length: 0....
> #
> U 192.168.6.104:50020 -> 192.168.6.100:5060
>   SIP/2.0 180 Ringing..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.9c3bbf61.0,SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaj i"
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-I D:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
> Cisco-SIP-IP-Phone/2..Date: Wed, 11 Feb 2004 18:33:50 GMT..CSeq: 101
> INV ITE..Content-Length: 0....
> #
> U 192.168.6.100:5060 -> 192.168.6.103:5060
>   SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 192.168.6.103:5060..From: "User
> ID Balaji" <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34
> ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Se rver:
> Cisco-SIP-IP-Phone/2..Date: Wed, 11 Feb 2004 18:33:50 GMT..CSeq: 101
> INVITE..Content-Length: 0....
> #
> U 192.168.6.104:50020 -> 192.168.6.100:5060
>   SIP/2.0 200 OK..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.9c3bbf61.0,SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji" <s
> ip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID:
> 00 0b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
> Cisco-SIP-IP-Phone/2..Contact:
> sip:3311 at 192.168.6.104:5060..Record-Route: <si
> p:3311 at 192.168.6.100;ftag=925f0b001c0632395f2e8-34ee90e;lr=on>..Date:
> Wed, 11 Feb 2004 18:33:53 GMT..CSeq: 101 INVITE..Content-Type: a
> pplication/sdp..Content-Length:
> 221....v=0..o=CiscoSystemsSIP-IPPhone-UserAgent 14538 26512 IN IP4
> 192.168.6.104..s=SIP Call..c=IN IP4
>    192.168.6.104..t=0 0..m=audio 24138 RTP/AVP 0 101..a=rtpmap:0
> pcmu/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-11..
> #
> U 192.168.6.100:5060 -> 192.168.6.103:5060
>   SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.6.103:5060..From: "User ID
> Balaji" <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e
> ..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
>    Cisco-SIP-IP-Phone/2..Contact:
> sip:3311 at 192.168.6.104:5060..Record-Route:
> <sip:3311 at 192.168.6.100;ftag=925f0b001c0632395f2e8-34ee90e;
>   lr=on>..Date: Wed, 11 Feb 2004 18:33:53 GMT..CSeq: 101
> INVITE..Content-Type: application/sdp..Content-Length:
> 221....v=0..o=CiscoSyste msSIP-IPPhone-UserAgent 14538 26512 IN IP4
> 192.168.6.104..s=SIP Call..c=IN IP4 192.168.6.104..t=0 0..m=audio
> 24138 RTP/AVP 0 101..a=rt pmap:0 pcmu/8000..a=rtpmap:101
> telephone-event/8000..a=fmtp:101 0-11..U 192.168.6.103:49834 ->
> 192.168.6.100:5060 ACK sip:3311 at 192.168.6.100:5060 SIP/2.0..Via:
> SIP/2.0/UDP 192.168.6.103:5060..From: "User ID Balaji"
> <sip:3322 at 192.168.6.100>;tag=925f 0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID:
> 000b5f92-63c00003-63cc121e-248e78 23 at 192.168.6.103..Date: Wed, 11 Feb
> 2004 18:33:53 GMT..Route: <sip:3311 at 192.168.6.104:5060>..CSeq: 101
> ACK..Content-Length: 0....
> #
> U 192.168.6.100:5060 -> 192.168.6.104:5060
>   ACK sip:3311 at 192.168.6.104:5060 SIP/2.0..Max-Forwards:
> 10..Record-Route:
> <sip:3311 at 192.168.6.100;ftag=925f0b001c0632395f2e8-34ee90e;lr
> =on>..Via: SIP/2.0/UDP 192.168.6.100;branch=0..Via: SIP/2.0/UDP
> 192.168.6.103:5060..From: "User ID Balaji" <sip:3322 at 192.168.6.100>;ta
> g=925f0b001c0632395f2e8-34ee90e..To:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..Call-ID:
> 000b5f92-63c00003-63cc121e- 248e7823 at 192.168.6.103..Date: Wed, 11 Feb
> 2004 18:33:53 GMT..CSeq: 101 ACK..Content-Length: 0....
> ###
> U 128.163.55.134:496 -> 224.0.1.40:496
>   ..........7=........
> ############
> U 192.168.6.104:50020 -> 192.168.6.100:5060
>   BYE sip:3311 at 192.168.6.100:5060 SIP/2.0..Via: SIP/2.0/UDP
> 192.168.6.104:5060..From:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de -474d2b85..To:
> "User ID Balaji"
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..Call-ID:
> 000b5f92-63c00003-63cc121e-248e78 23 at 192.168.6.103..Date: Wed, 11 Feb
> 2004 18:34:02 GMT..User-Agent: Cisco-SIP-IP-Phone/2..CSeq: 101
> BYE..Route: <sip:3322 at 192.168.6.103 :5060>..Content-Length: 0....
> #
> U 192.168.6.100:5060 -> 192.168.6.103:5060
>   BYE sip:3322 at 192.168.6.103:5060 SIP/2.0..Max-Forwards:
> 10..Record-Route:
> <sip:3311 at 192.168.6.100;ftag=c25f0b001363563cc13de-474d2b85;l
> r=on>..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.ac3bbf61.0..Via: SIP/2.0/UDP
> 192.168.6.104:5060..From: <sip:3311 at 192.168.6.10
> 0>;tag=c25f0b001363563cc13de-474d2b85..To: "User ID Balaji"
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..Call-ID:
> 000b5 f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Date: Wed, 11 Feb
> 2004 18:34:02 GMT..User-Agent: Cisco-SIP-IP-Phone/2..CSeq: 101 BYE..Co
> ntent-Length: 0....
> #
> U 192.168.6.103:49834 -> 192.168.6.100:5060
>   SIP/2.0 200 OK..Via: SIP/2.0/UDP
> 192.168.6.100;branch=z9hG4bK8153.ac3bbf61.0,SIP/2.0/UDP
> 192.168.6.104:5060..From: <sip:3311 at 192.168.6
> .100>;tag=c25f0b001363563cc13de-474d2b85..To: "User ID Balaji"
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..Call-ID:
> 00 0b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
> Cisco-SIP-IP-Phone/2..CSeq: 101 BYE..Content-Length: 0....
> #
> U 192.168.6.100:5060 -> 192.168.6.104:5060
>   SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.6.104:5060..From:
> <sip:3311 at 192.168.6.100>;tag=c25f0b001363563cc13de-474d2b85..To: "User
> ID B alaji"
> <sip:3322 at 192.168.6.100>;tag=925f0b001c0632395f2e8-34ee90e..Call-ID:
> 000b5f92-63c00003-63cc121e-248e7823 at 192.168.6.103..Server:
>    Cisco-SIP-IP-Phone/2..CSeq: 101 BYE..Content-Length: 0....
> ######
> exit
>
> Thanks in advance,
> Balaji
>
>
>
>
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Regards,
Lakmal

Lankacom Services (Pvt) Ltd.
65C, Dharmapala Mawatha,
Colombo 07.
Sri Lanka.
Tel: +94-1-437545
www.lankacom.net