[cisco-voip] Dial plans

[Dennis Heim]

Things to think about:


1)      Change access code to something other than 9. Otherwise there always seems to be a group that become buddy buddy with their local 911 operator. Possibly use 8.

2)      Pick a number to be your access code for intersite callings, for example 1.

a.       One option would be 1 + <2-digit site code> + <current 5 digit-dn>

3)      Create a translation pattern that for 5 digits that do not start with 0,1 or 8 or  [2-7]XXXX then prepend their site code. This way calls within the site (intra-site) is still a 5 digit code

4)      For your site that starts with 9, as painful as it is, I would move them out of the 9 range.

This is all going to be fairly painful, but will definitely make life easier, and allow you to scale up to 99 sites. This maintains their existing 5 digit extensions, and keeps intra-site dialing the same or very similar.

Dennis Heim
Network Voice Engineer
CDW  Advanced Technology Services
11711 N. Meridian Street, Suite 225
Carmel, IN  46032

317.569.4255 Office
317.569.4201 Fax
317.694.6070 Cell
dennis.heim at cdw.com<mailto:dennis.heim at cdw.com>
www.berbee.com<http://www.berbee.com/>

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of george.hendrix at l-3com.com
Sent: Friday, February 12, 2010 3:59 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Dial plans

Hi everyone,

  I was wondering if anyone could tell me the best approach for a dial plan or of any link you can send me for best practices.  Currently we only have a couple of sites which have 5 digit dialing within each cluster and also of course internally in each cluster.  We are consolidating into one single cluster.  We will also have about 25 remote sites later.  Right now, users on the VOIP system dial 9 to dial external numbers.  We have a new site which is assigned numbers where the 6th digit is a 9, so for 5 digit dialing, there number is 9XXXX.  I understand that I can simply put the line DN below external route patterns (but also causes a 15 second delay for those extensions to be dial as the system waits for more digits).  However, my concern is that there may be an overlap of extensions later in the system 25 (or more) sites.  I don't think it will happen, but I'd also be concerned of two users with the same last 5 digits, even though users are in different area codes.

Thanks,

Bill Hendrix
L-3 Communications
george.hendrix at l-3com.com<mailto:george.hendrix at l-3com.com>
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