[cisco-voip] Dial plans

Mon Feb 15 09:53:10 EST 2010

I think you've stumbled upon a cost savings measure that is OK in the
education space but wouldn't fly under any circumstances in the corporate
world - I can't think of any of my customers with enough DID's to make an
impact on the budget that would actually consider giving them up ;)

As far as scalable dial plans, I'm a big fan of either 10-digit (NANP only)
or country code + DID (E164 without the +) assigned as phone DN's -
guaranteed global uniqueness which assists for shared services such as
voicemail.  For sites without DID's, typically a shortened internal only
number is used and a list is maintained for within the organization.
Site-to-site dialing with a single site or campus can be shortened using
translation patterns to allow for 4/5/6/x digit dialing.  If you intend to
route enterprise calls on-net, dialing the full DID number without an access
code can route across the network, dialing anything with a prefix of 9 (or
8, or whatever...) goes out the PSTN.

Matthew Saskin
msaskin at gmail.com
203-253-9571

July 18, 2010 - 1500m swim (in the hudson), 40k bike, 10k run
Please support the Leukemia & Lyphoma Society
http://pages.teamintraining.org/nyc/nyctri10/msaskin

On Sat, Feb 13, 2010 at 9:51 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

>  Two questions come to mind: how many office extensions do you really
> need, and how long until "budget cuts" require you to move from DIDs to an
> auto-attendant?
>
> With a five digit dial plan and removing 0 and 9 as the first digit, you
> have over 50,000 possible extensions. Is that not enough?
>
> Also, how much are you paying for DIDs? Even at a $1/mo and 5,000 DIDs,
> that's 60 grand per year. We've never had DIDs except for the odd one out
> for special purposes, so I can't really speak to the efficacy of them, but
> auto-attendants seem to do the job around here.
>
>
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cooking with unix is easy. You just sed it and forget it.
>                               - LFJ (with apologies to Mr. Popeil)
>
>
>
> ----- Original Message -----
> From: "george hendrix" <george.hendrix at l-3com.com>
> To: "Jason Fuermann" <JBF005 at shsu.edu>, "Syed Ahmed" <sahmed39 at hotmail.com>,
> "jason aarons" <jason.aarons at us.didata.com>, moody at arizona.edu,
> cisco-voip at puck.nether.net
> Sent: Saturday, February 13, 2010 9:05:05 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [cisco-voip] Dial plans
>
>  I have been thinking 10 digit dialing also, due to the fact that we are
> going to be hosting users across like 30 different area codes.  Allowing
> each location to dial users in the same location with 5 or even 4 digits is
> easy, but I just don’t think 5 digit dialing between locations with that
> many different locations is worth the hassle and headache.  I have also seen
> where you have to plan for the inevitable changes that will occur, such as
> new sites stood up, and a host of other things, like we had one site that
> actually changed numbers when it was converted from one provider to another
> (there was a good reason for it).  I like to take the approach “expect the
> unexpected”, otherwise you set yourself up for a mess later.  Thanks for all
> the input and info and especially the dial plan link.  It is really going to
> help a lot.
>
>
>
> Bill Hendrix
>
> L-3 Communications
>
> george.hendrix at l-3com.com
>
> [image: STRATIS - Horizontal with Tag line]
>
>
>
> *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 8:28 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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