Cannot register Cisco phone 7841

[Tazio4436]

Hi ,

I have been adding Cisco phones to my network without any problem.We bought 5 new 7841 phones from Cisco and someone from Cisco did the License part for me.There is no Licensing issue but when I am trying to add a Cisco 7841 I can see phone displays "Registration in progress" and in CUCM it shows Registration Rejected.

One time it showed Error Mismatch.

Any help will be much appreciated.

Thanks

Tazio

[Jaime Valencia · Accepted solution]

Are the devices properly configured in CUCM?

Are you using the right phone model?

[Mohammed al Baqari · Accepted solution]

Delete ITL file from the phones or reset security settings and check if
they register

[Tazio4436]

Just did that and still showing not registered.

Thanks
Tazio

[HARIS_HUSSAIN · Accepted solution]

What is the Call Manager Version?
Go to Phone web page and Check what does the status Message shows Or Else collect the Phone Console Logs and upload it here.
Procedure to collect console logs is as below
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/213548-procedure-to-collect-the-phone-console-l.html

*** Please rate helpful post; Mark "Accept as a Solution" if applicable

Thanks,
Haris

[HARIS_HUSSAIN · Accepted solution]

Also Follow below links to delete ITL and security settings as suggested by Mohammed al Baqari.

https://kb.variphy.com/knowledge-base/delete-itl-file-reset-security-settings-on-cisco-7800-ip-phones/
https://www.youtube.com/watch?v=P95gsAPILA8

*** Please rate helpful post; Mark "Accept as a Solution" if applicable

Thanks,
Haris

[Tazio4436]

Hi,

Thank you very much for your help.

Surprisingly today when I came to office I could see the phone was already registered.

I think I did not wait long enough when I deleted the ITL and Security settings.

Now it is registered and working fine.

Thanks you to everyone for your support and help.

Rergards

Tazio