[cisco-voip] I need some feedback on the use of alternate enterprise number mask

[Barnett, Nick]

Here's the scenario. Our HQ has been on CUCM for several years, but our field offices have their own pots KSU solutions. We are deploying IPT to the field offices as we speak. The field offices are consistently setting speed dials to call back to other on net DNs, but prefixing a 9. This causes the call to trombone and eats up call path and resources. No amount of training or bulletins to the field seems to work. They have been dialing 9 to reach HQ for decades.

I'm aware that we should try and go full e164, but we have issues with non-did numbers and it is a fairly complex dialplan. I'll get there, I just can't do it right now.

My idea is to use the alternate enterprise number mask on the DNs. We use 11 digit DNs, so the Alt number mask would like 9XXXXXXXXXXX. This gives a derived DN of 913095551234, which keeps the calls on net. Cool, mission accomplished... I think.

Does this method cause any call processing issues? I'm slightly worried that it could raise processor usage... but I'm mostly just worried about it because it is "new" to me.

Has anyone used the alt Ent number mask for this work around?

Thanks,
Nick
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