Design scenario with Site Codes and CUCM 6.x

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Aug 25th, 2009
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Im looking at deploying around 6k phones. I have about 15 sites. In the past, I have set up the following,

4 digit DNs at the line

VM profile to mask to 7 digits (site code+dn)

And then Translation patterns to/from each site. (7 digit, to another CSS site, strip the site code, 4 digit line)

This has always worked fine for me.

I could be lazy and put all the lines in 7 digits format into one CSS, but that is not very efficient for CUCM or for managing each site. (in my opinion)

any other ideas engineers have tried? Granted, a gatekeeper would be nice as well, but for this project.

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mrugeshpatel_2 Fri, 08/28/2009 - 13:35
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You actually have the site code design reversed.

The DNs will be 7 digits not 4 digits (on-net code + side code + 4 digit of the extension).

For example siteA ext will be 8152001 and siteB's extn will be 8163001.(on-net code "8", siteA code "15", siteB code "16")

site-to-site calling will be 7 digits.

internal calling will be 4 digits, siteA users will call 2xxx (a translation pattern will prefix 815), siteB users will call 3xxx (a translation pattern will prefix 816)

Hope this helps

Tommer Catlin Mon, 08/31/2009 - 10:31
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So you are putting all the DNs in the same PT then correct?

Tommer Catlin Mon, 08/31/2009 - 10:38
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yeah, I want to do that, but but in the past I have looked how CUCM analyzes data and the efficiency of the database. if I have all the lines in one PT, I could possibly have the potential of 15k options everytime someone picks up the phone to dial. (15k line1)

This could potentially put a strain on large deployments with a single PT for all line1.

I was looking for other option if anyone has done something different.


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