[cisco-voip] Dial Plan

[Voice Noob]

There is nothing wrong with your current design. I would keep it as it is
using the translation patters. I don't know if I would use the 8 plus the
site code or just use the site code plus extension but it does not matter
that much in the end.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Granger, Simon
Sent: Wednesday, August 19, 2009 5:05 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Dial Plan

 

We have had Call Manager 6.1 in place globally.  Clusters are based  Europe,
US and Asia.  Our Global design and dial plan was designed in conjunction
with Cisco Advanced Services 2 years ago.

 

Essentially all internal numbers are unique.  They consist of 7 digits.
This comprises 3 digits for an internal site code and 4 digits for site
extension which is the last 4 digits of the DDI.  The design encompasses
partitioned addressing scheme.  Internal intersite dialling is accomplished
via dialling an access code of 8 followed by the 7 digit extension number.
This works via translation pattern of translating 8 to 7 digits where the
translation pattern has the access to the partition of the dialled 7 digit
extension in another site.  Internal dialing within a site is 4 digits by
translation pattern of 4 to 7 digits of the actual real DN.

 

Our re-seller in the US is stating this is not best practice.  They want to
change the dial plan so all DN's are now 8 digits and not 7 beginning with
8.  They want to remove the Translation pattern and give direct access
across all DNs.  They state this change will be good for the future.

 

We in Europe are sceptical of such a change.  We believe this removes a lot
of the flexibility of the original dial plan.  Also it cause problems if we
want to impose any Class of Restriction.  We have also not seen anywhere
that this would be best practice.

 

If anyone has any thoughts it would be most appreciated.

 

 

Thanks

 

 

 

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