[cisco-voip] Dial plans

[Jason Aarons (US)]

You really need to look at your DNs/DIDs and map it out carefully. That
said my generic advice is put 10 digit DNs (or E164 if intl) everywhere,
then setup 5-digit local translation patterns.  This allows Unity
UM/UCCX to work across multiple sites.  The larger you are the more
important it is to plan carefully before deployment and seek
professional help to discuss the pros/cons and lab test to avoid
interdigit timeout/potential matches exist problems.

Search Cisco.com for Deploying Variable-Length On-Net Dial Plans with
Flat Addressing
http://www-uk.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/devmobil.h
tml#wp1043929


-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Walt Moody
Sent: Friday, February 12, 2010 5:00 PM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Dial plans

Bill,

How about 7 digit dialing internally and 7 digit, 10 digit, 1+, and
011+ dialing "outside?"

We switched to NANP-style dialing more than 15 years ago and it has
really simplified our phone translations.  One unanticipated benefit
is that our users now know their whole phone number rather than just
the last 5 digits.  That really helps when you have 40,000+ DID numbers
in five area codes.

-walt

On 2/12/2010 1:58 PM, george.hendrix at l-3com.com wrote:
> 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 6^th
> 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>
>
> STRATIS - Horizontal with Tag line
>
>
>
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