topic Re: Unregistered Cisco phone in IP Telephony and Phones

Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 07:55:03 GMT

Dear All,

The cisco phone Unregistered without any reason it working normally and suddenly not working.

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 08:18:26 GMT

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 08:23:16 GMT

I don't understand

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 08:39:00 GMT

Without any useful information other than "it worked before and now it does not", it is, indeed, a "cool story".

Re: Unregistered Cisco phone

b.winter — Wed, 31 May 2023 08:45:48 GMT

In other words: "Why don't you start troubleshooting the problem?!" or "What troubleshooting steps have you already done?"

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 08:51:37 GMT

I already removed the phone from CUCM and create it again ,disable the DHCP in the phone and enable it again but still unregistered

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 08:56:44 GMT

Ok,

I have CUCM In BE6000M Device and i try solve my issue as following:

removed the phone from CUCM and create it again ,disable the DHCP in the phone and enable it again but still unregistered.

The phone model Cisco 3905

Re: Unregistered Cisco phone

b.winter — Wed, 31 May 2023 09:10:14 GMT

And have you checked the logs of the phone and CUCM? Have you checked the switch-port / the switch / the cable?
That's basic troubleshooting...

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 09:14:21 GMT

If the phone is not registering, is the phone, at the very least, getting a valid IP address?

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 09:43:35 GMT

yes and it is working properly but suddenly stop working (Unregister)

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 10:11:09 GMT

You are not answering the question.

Is the phone getting a valid IP address or not?

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 10:25:40 GMT

Yes

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 10:35:17 GMT

Have you tried to factory-reset the phone?

Did you clear the ITL?

Re: Unregistered Cisco phone

ahmedhamed301187 — Wed, 31 May 2023 12:38:52 GMT

No, Please tell me how

Re: Unregistered Cisco phone

Leo Laohoo — Wed, 31 May 2023 22:47:12 GMT

@ahmedhamed301187 wrote:

No, Please tell me how

Oh, FFS!

Re: Unregistered Cisco phone

ahmedhamed301187 — Thu, 01 Jun 2023 05:29:27 GMT

Thank you for your strange replay and your help

Re: Unregistered Cisco phone

Leo Laohoo — Thu, 01 Jun 2023 05:42:00 GMT

Please engage your CUCM administrator.

Re: Unregistered Cisco phone

ahmedhamed301187 — Thu, 01 Jun 2023 06:46:12 GMT

Please any one help me

Re: Unregistered Cisco phone

ahmedhamed301187 — Thu, 01 Jun 2023 06:49:18 GMT

Thank you for your effort and cooperation.

Re: Unregistered Cisco phone

Jonathan Schulenberg — Fri, 02 Jun 2023 10:30:23 GMT

Leo’s righteous humor aside, you need to do more of the legwork here. We’re volunteering our time; please be respectful of it. You could have easily Googled how to clear the ITL from a Cisco phone, for example.

If you’re not comfortable with the basics then I suggest opening a TAC case and having them walk you through it.

Since you deleted and re-added the phone, it’s worth verifying that the cluster and database replication are healthy. There are CLI commands for both of these tests.

After that you really need logs (CCM SDL and phone console) and potentially a PCAP. Logs will tell you what each side (phone & CUCM sub) believe caused the phone not to register. The PCAP would be necessary if they claim the TCP connection was lost - which would point at some other network connectivity issue.