We”re going to configure Cisco Auto Configuration feature on CUCM with minimum settings.

Log in to CUCM

1. Define the default signaling protocol for auto registered phones

Go to Systems –> Entreprise Parameters

Choose the signaling protocol that phones will use to register to CUCM.

By default, IP phones will use the signaling protocol that is defined in Enterprise Parameters.

2. Enable Auto Registration on at least one CUCM group

Go to Cisco Unified CM Group:

Click on the Unified CM Group that you want phones to register to:

Verify that the Auto Registration checkbox is checked.

3. Enable Auto Registration on one CUCM server

Go to Cisco Unified CM

Select the Cisco Unified Communications Manager subscriber server that phones will register to:

Uncheck the Auto Registration Disabled on This Cisco Unified Communications Manager checkbox, and define the range of extensions that will be assigned to the auto-registered phones:

Auto Registered phone

Here is a phone that registered to CUCM through the Auto Registration feature.

Notice that the Auto Registration feature gave the DN of 1000 to the line associated with the phone, and the DN is in partition None.

It’s not a good practice to leave the DN in the None partition. So we will put it in the Internal_PT. Make sure there is no other DN 1000 in Internal_PT partition.

 

Disabling Auto-registration on a CUCM group

Once auto-registration is activated on a CUCM group, it is not possible to disable it with the same checkbox: the checkbox is greyed.

Instead, we select another CUCM group and assign to it the auto-registration capability:

Deleting a CUCM Group configured with Auto-registration

Back to the CUCM Group “UCM.Group1” that is configured with Auto-registration. It is not possible to immediately delete a CUCM group configured with auto-registration; instead, we need to assign Auto-registration to another group first. For example, we set the Default CUCM group with auto-registration temporarily while we delete UCM.Group1: