CUCM 12.0 | Allow extension to be dialed ONLY by other specific extensions?

[RITR]

We have an alert system extension that we want to be dial-able only from specific phones. Is there a way to restrict who can dial a specific extension?

[R0g22 · Accepted solution]

Only have the specific phone/line CSS access to the alert system extension partition.

[RITR]

When you say "access" what do you mean, specifically?

We had a route group pre-setup that forwarded to a null destination so I used that. But I'm curious if there was another way.

[Jaime Valencia]

CSS and partitions are the basic building blocks for calling privileges, that's what you need to use, I suggest you read this

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/8x/uc8x/dialplan.html#wp1044276

[Ratheesh Kumar]

Hi there

Following Jaime's and Nipun's comments

Create a Partition for Alert number (PT_Alert)

Since you want to allow this to only some specific users, you might need to create another CSS for the restrict users.

CSS_UserGroup1 (Which has access to Alert) - Add PT_Alert to this CSS

CSS_UserGroup2 (Which Do not have access to Alert) - Dont add PT_Alert to this CSS

make sure you include your PT_Alert to all other Generic CSS (Like Gateway etc) if you need incoming reach to that number

Hope this helps!

Cheers
Rath!

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