[cisco-voip] Dial plans

[Jason Shearer]

We have had to approach our large dial plan a little different.  Currently we have about 250 sites on a single cluster none of which have DID (only our corporate site has DID).  All remote sites are very small and have a handful of 1FBs.  Each site has an accounting code which we use as a site code.  To dial inter-site users must dial 5+<SiteCode>+<LocalExtension>.   Xlates have been set up so users can dial *+<SiteCode> to reach the local receptionist.

Works pretty good, very scalable.

Jason

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Fuermann, Jason
Sent: Friday, February 12, 2010 7:28 PM
To: 'Syed Ahmed'; jason.aarons at us.didata.com; moody at arizona.edu; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Dial plans

I don't like the 7 digit dialing, multiple area codes end up having the same exchanges, then you're done for. Looks like 10 digit might be your best bet, due to your limitations

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Syed Ahmed
Sent: Friday, February 12, 2010 6:04 PM
To: jason.aarons at us.didata.com; moody at arizona.edu; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Dial plans

Totally agree. We had our Cisco CCIE VoIP verify our dial plan before we deployed it. I do agree with Walt that 7-digit dialing is a good thing. It is scalable. Do use translation pattern for your 5-digit dialing.

Syed

> Date: Fri, 12 Feb 2010 18:06:52 -0500
> From: jason.aarons at us.didata.com
> To: moody at arizona.edu; cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Dial plans
>
> 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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