PHONE IS TRYING TO REGISTER WITH ITSP AS AGAINST CME

[Jesutofunmi O]

Hello Guys, 

I got a SIP trunk from an ITSP but have been unable to register it. The problem is that the ITSP's SBC is rejecting my sip-ua registration request (from CME) because the requests coming from my CME are too many.  MY Cisco 7945 PHONES ARE ALSO SENDING REGISTRATION REQUESTS TO THE ITSP.  PLEASE HOW DO I STOP THIS? HELP!!!

May 30 17:08:59.893: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
REGISTER sip:cme.telecoms.com:5060 SIP/2.0
Via: SIP/2.0/UDP 41.xx.xx.xx:5060;branch=z9hG4bK5441614
From: <sip:1022@cme.telecoms.com>;tag=B7C5104-F1C
To: <sip:1022@cme.telecoms.com>
Date: Thu, 30 May 2019 17:08:59 GMT
Call-ID: 3DF091F9-823111E9-B65BE35C-F9412332
User-Agent: Cisco-SIPGateway/IOS-15.3.3.M5
Max-Forwards: 70
Timestamp: 1559236139
CSeq: 2 REGISTER
Contact: <sip:1022@41.xx.xx.xx:5060>
Expires: 3600
Supported: path
Content-Length: 0

May 30 17:08:59.901: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
REGISTER sip:cme.telecoms.com:5060 SIP/2.0
Via: SIP/2.0/UDP 41.xx.xx.xx:5060;branch=z9hG4bK5482262
From: <sip:1026@cme.telecoms.com>;tag=B7C5110-55E
To: <sip:1026@cme.telecoms.com>
Date: Thu, 30 May 2019 17:08:59 GMT
Call-ID: 3DF12EBA-823111E9-B65FE35C-F9412332
User-Agent: Cisco-SIPGateway/IOS-15.3.3.M5
Max-Forwards: 70
Timestamp: 1559236139
CSeq: 2 REGISTER
Contact: <sip:1026@41.xx.xx.xx:5060>
Expires: 3600
Supported: path
Content-Length: 0

May 30 17:09:00.041: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
REGISTER sip:cme.telecoms.com:5060 SIP/2.0
Via: SIP/2.0/UDP 41.xx.xx.xx:5060;branch=z9hG4bK552E16
From: <sip:1036@cme.telecoms.com>;tag=B7C5194-103
To: <sip:1036@cme.telecoms.com>
Date: Thu, 30 May 2019 17:09:00 GMT
Call-ID: 3DF12EBA-823111E9-B669E35C-F9412332
User-Agent: Cisco-SIPGateway/IOS-15.3.3.M5
Max-Forwards: 70
Timestamp: 1559236140
CSeq: 2 REGISTER
Contact: <sip:1036@41.xx.xx.xx:5060>
Expires: 3600
Supported: path
Content-Length: 0

May 30 17:09:00.053: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
REGISTER sip:cme.telecoms.com:5060 SIP/2.0
Via: SIP/2.0/UDP 41.xx.xx.xx:5060;branch=z9hG4bK554D8C
From: <sip:1038@cme.telecoms.com>;tag=B7C519C-1A60
To: <sip:1038@cme.telecoms.com>
Date: Thu, 30 May 2019 17:09:00 GMT
Call-ID: 3DF12EBA-823111E9-B66BE35C-F9412332
User-Agent: Cisco-SIPGateway/IOS-15.3.3.M5
Max-Forwards: 70
Timestamp: 1559236140
CSeq: 2 REGISTER
Contact: <sip:1038@41.xx.xx.xx:5060>
Expires: 3600
Supported: path
Content-Length: 0

[Rolando Valenzuela]

Is your CME a registrar server? What IPs does your phones have for TFTP servers?

Rolando A. Valenzuela

[Jesutofunmi O]

Hello Rolando, 

1. My CME is the registrar server (at least all phones can call each other-intercom and dial-peers)

2. The TFTP server address is the address of the CME 172.16.xx.xx

[Jesutofunmi O · Accepted solution]

So people who come after can find a solution. I already found a fix to this. 

This solved it for me;

Go to ephone-dn and issue the "no-reg" command after "number xxxx no-reg". Example below;

ephone-dn 1 dual-line
number 1001 no-reg 
label John Smith
description John Smith

I hope someone else finds this helpful

[port.islander]

If someone wants to do the same for SIP phones:

There is no no-reg in voice register global, you only configure it in the dn:
voice register dn 1
  number 1001
  no-reg

If that doesn't work...

In my case, the router still sent the registration of the phone to the provider after that. I unplugged the phone, no change. I removed the phone (pool and dn) config, no change. I removed the sip-ua for the connection to the provider but once I moved it back, the router did the same thing. In the end, only a reload could fix the problem.