Some times ims_charging module not sending ccr terminate request to Diameter Server upon receiving the BYE Request .

**ISSUE Description:** 1 ) Consider User A registered with kamailio. 2 ) A called PSTN number ..Initial CCR request went to diameter server successfully. 3 ) PSTN number hangup the call....Here After BYE Transaction is done...Kamailio is generating a new BYE request to itself and it is retransmitting it four times. 4 ) I think this is the reason Ims_cahrging not generating ccr terminate request.

**Please find below sip traces. [Proxy is : 7080 , gateway : 5060]**

BYE sip:+xxxxxxxxxxxx@xxxxxxxxxxxx:35465 SIP/2.0 Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;branch=z9hG4bK05c0a4d6 Route: sip:xxxxxxxxxxxx:7080;lr;transport=UDP;did=492.d7f1 Max-Forwards: 70 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: SM SoftSwitch 11-06C13 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0

SIP/2.0 200 OK Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;rport=5060;branch=z9hG4bK05c0a4d6 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: Janus WebRTC Gateway SIP Plugin 0.0.6 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, UPDATE Content-Length: 0

BYE sip:xxxxxxxxxxxx:7080;lr;transport=UDP;did=492.d7f1 SIP/2.0 Via: SIP/2.0/UDP xxxxxxxxxxxx:7080;branch=z9hG4bK461c.5003522650d9dbb33e47c6d83d7465b8.1 Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;rport=5060;branch=z9hG4bK05c0a4d6 Max-Forwards: 69 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: SM SoftSwitch 11-06C13 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0

BYE sip:xxxxxxxxxxxx:7080;lr;transport=UDP;did=492.d7f1 SIP/2.0 Via: SIP/2.0/UDP xxxxxxxxxxxx:7080;branch=z9hG4bK461c.5003522650d9dbb33e47c6d83d7465b8.1 Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;rport=5060;branch=z9hG4bK05c0a4d6 Max-Forwards: 69 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: SM SoftSwitch 11-06C13 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0

BYE sip:xxxxxxxxxxxx:7080;lr;transport=UDP;did=492.d7f1 SIP/2.0 Via: SIP/2.0/UDP xxxxxxxxxxxx:7080;branch=z9hG4bK461c.5003522650d9dbb33e47c6d83d7465b8.1 Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;rport=5060;branch=z9hG4bK05c0a4d6 Max-Forwards: 69 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: SM SoftSwitch 11-06C13 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0

BYE sip:xxxxxxxxxxxx:7080;lr;transport=UDP;did=492.d7f1 SIP/2.0 Via: SIP/2.0/UDP xxxxxxxxxxxx:7080;branch=z9hG4bK461c.5003522650d9dbb33e47c6d83d7465b8.1 Via: SIP/2.0/UDP xxxxxxxxxxxx:5060;rport=5060;branch=z9hG4bK05c0a4d6 Max-Forwards: 69 From: sip:xxxxxxxxxxxx@xxxxxxxxxxxx;tag=as4ab1ab4b To: "+xxxxxxxxxxxx" sip:+xxxxxxxxxxxx@xxxxxxxxxxxx;tag=8110a0S32NHgp Call-ID: 8fa995a0-061c-11ea-8d83-00505697042b CSeq: 102 BYE User-Agent: SM SoftSwitch 11-06C13 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0