How To Configure A CUCM Translation Pattern

Before we see how a CUCM translation pattern is configured, I suggest you to refresh your knowledge about the topic by checking the link here.

A Translation Pattern can be set in routing mode or in blocking mode. We are going to configure an example of both in this article.

For this, we are going to take as example the pattern 9999 and:

  • expand it to a PSTN number once, then
  • block it.

Configuring a Routing Translation Pattern

Under the translation pattern configuration menu, we create a new pattern, for example 9999. Then we set a Called Party Transform Mask of 9011442072431810, which emulates a PSTN number:

cucm translation patterns configuration menu

cucm-translation-patterns-2016-05-29 17_10_11

Calling 9999 is successful will expand to a full number of 9011442072431810:

cucm calling the number

the number has been expanded

Configuring a Blocking Translation Pattern

We take the same pattern, and set it to blocking. We can add a custom cause code.

cucm-translation-patterns-2016-05-29 17_13_41

And we try the call again. The line hangs up silently.

What about an overlap with a route pattern?

Trying to add a translation pattern that overlaps with a route pattern won’t be accepted by CUCM:

cucm-translation-patterns-2016-05-29 17_30_45

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