Hello, are you using topoh module? A pcap with all sip messages part of the dialog, from the initial INVITE to the last BYE transaction would be important to have in order to investigate how the headers are changed. Cheers, Daniel On 28/12/2016 13:11, Nihar Ranjan Deb wrote:

Hi All,

I am a new user of kamailio. We have setup a kamilio server with RTP proxy. Most of the features are working fine except BYE.

Say User A and B are registered in kamailio server. A (caller) connected to B(called), call established.

1. If Caller (A) disconnects the call, everything goes fine. B gets disconnected and call releases.

2. But if Called party (B) disconnects the call, A never gets disconnected. I checked trace as well, in this case caller (A) gets a BYE with B's callid. So A rejects call with "481 call leg transaction doesn't exists".

Basically A party and B party has separate dialog established with Kamilio. So they have two separate callids . All messages are exchanged correctly. Only when B party disconnects call, kamailio sends BYE to A party with B party callid.

Please help me to resolve this issue. Do let me know if any more information required.

------ INVITE--------------------------

INVITE sip:966268@*** SIP/2.0

Via: SIP/2.0/UDP 192.168.1.36:63238;branch=z9hG4bK-524287-1---e64d171ec3b0b54e;rport

Max-Forwards: 70

Contact: <sip:334031@***:8906;rinstance=ea9b5f48eb342a98>

To: <sip:966268@***>

From: "334031"<sip:334031@****>;tag=4406552c

Call-ID: *82158NzljY2NiYTA5YmI3M2U1MzQyODgwMWYwYTI3ZWJjNzc*

CSeq: 2 INVITE

Allow: SUBSCRIBE, NOTIFY, INVITE, ACK, CANCEL, BYE, REFER, INFO, OPTIONS, MESSAGE

Content-Type: application/sdp

Proxy-Authorization: Digest username="334031",realm="*****",nonce="****",uri="sip:966268@***",response="***",algorithm=MD5

Supported: replaces

User-Agent: X-Lite release 4.9.6 stamp 82158

Content-Length: 334

v=0

o=- 13127393523589215 1 IN IP4 192.168.1.36

s=X-Lite release 4.9.6 stamp 82158

c=IN IP4 192.168.1.36

t=0 0

m=audio 57116 RTP/AVP 9 8 120 0 84 101

a=rtpmap:120 opus/48000/2

a=fmtp:120 useinbandfec=1; usedtx=1; maxaveragebitrate=64000

a=rtpmap:84 speex/16000

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-15

a=sendrecv

-------------------------BYE--------------------------------

BYE sip:334031@192.168.1.36:63238;rinstance=ea9b5f48eb342a98 SIP/2.0

Via: SIP/2.0/UDP ***:5060;branch=z9hG4bKa28b.a2ac8c26802cdcc8c619784643f82000.0

Via: SIP/2.0/UDP 10.0.0.1;branch=z9hG4bKsr-HqsDUwx8-phRByVr-9VwUlbcUlPcIpKo-0noY0rjI95gmMhg10qgY9mc-w5He0EJbTbkb3AZt2Yna6n4uPmqbJWEYwVKYlDTYlH*

From: <sip:966268@***>;tag=1665200125

To: "334031" <sip:334031@***>;tag=4406552c

Call-ID: *!!:xePve9XKtEJ4NJJT-2hM9lsXe6RemqZPIRAa1PZf1wJ4DRx5ePRce0OwbHAY-RD4Hlya-HRweMH4N6RemHYMI9Y0tV***

CSeq: 3 BYE

Contact: <sip:10.0.0.1;line=sr-mcsjIlJcYlxcIPVo-0-8Ylb8-9bKUlPjIlxEYwbw>

Max-Forwards: 69

User-Agent: Yealink SIP-T20P 9.72.0.80

Content-Length: 0

-------------------------- 481---------------------

SIP/2.0 481 Call/Transaction Does Not Exist

Via: SIP/2.0/UDP ***:5060;branch=z9hG4bKa28b.a2ac8c26802cdcc8c619784643f82000.0;received=35.164.228.12

Via: SIP/2.0/UDP 10.0.0.1;branch=z9hG4bKsr-HqsDUwx8-phRByVr-9VwUlbcUlPcIpKo-0noY0rjI95gmMhg10qgY9mc-w5He0EJbTbkb3AZt2Yna6n4uPmqbJWEYwVKYlDTYlH*

To: "334031" <sip:334031@***>;tag=4406552c

From: <sip:966268@***>;tag=1665200125

Call-ID: !!:xePve9XKtEJ4NJJT-2hM9lsXe6RemqZPIRAa1PZf1wJ4DRx5ePRce0OwbHAY-RD4Hlya-HRweMH4N6RemHYMI9Y0tV**

CSeq: 3 BYE

Accept-Language: en

Content-Length: 0

Regards,

Nihar

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