We are re going to configure Auto registration on CUCM using minimum settings.

1. Define the default signaling protocol

Login to CUCM. Then go to Systems –> Entreprise Parameters

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Choose the signaling protocol that phones will use to auto-register to CUCM. We have either SCCP or SIP.

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

2. Enable The Feature on at Least One CUCM Group

Go to Cisco Unified CM Group:

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

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Verify that this checkbox is activated:

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3. Enable It on one CUCM Server

Go to Cisco Unified CM

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

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

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Here is an example of a successfully registered phone on CUCM:

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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.

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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.

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Disabling the Feature on a CUCM Group

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

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So we can not disable it on the CUCM group “UCM.Group1”

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

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Deleting a CUCM Group configured with Auto-Registration

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

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We have successfully deleted “UCM.Group1”

Categories: CCNA Collaboration

Keyboard Banger

Keyboard Banger is a network engineer from Africa. He has been working in network support and administration since 2008. He started writing study notes about certification exams and technology topics a couple of years ago. When he's not writing articles, he can be found wandering on technical forums.

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