[Asterisk-Users] How to number extensions - Which way is best?

[Moody]

I would suggest the most important concern is that you set your
extensions high enough that people calling from the outside have say
options 1,2,3 and the extensions don't interupt those otherwise you
get people dialing the options by accident which can be annoying if
one of those options is manned.

Also leave yourself room to extend those options.. ther is nothing
worse then having to move your extensions. I usually start about 7 or
8.


On Mon, 7 Feb 2005 17:48:22 -0600, Jay Milk <jay at skimmilk.net> wrote:
> I'd say, consider your audience (user-base) and let common sense
> prevail.
> 
> If your user-base is accustomed to business PBXs, they'll already expect
> to have to dial a 9 or 7 to "get out".  In that case, number your
> extensions any way you like, must avoid that "outside" digit.
> 
> Personally, I prefer a "transparent" PBX, and this is my setup:
> 
> 011... - International calls
> 1... - NANPA calls
> 2... - internal extensions
> 3... - external extensions (SIP/IAX clients)
> 411 - operator
> 6... - speed dial
> 8... - direct trunk access (in my case -- all IAX --, that means it will
> set the proper caller-id for outgoing calls)
> 911 - guess that that's for.
> 
> The advantage here is that incoming calls can generally be returned
> without any digit-magic, just by selecting a number from the incoming
> call-list and pushing Redial or what have you.  Since I use multiple
> providers, I have an agi script that "normalizes" this number for me
> (http://muware.com/asterisk)
> 
> If you have a T1 with a thousand-block of DIDs, I'd recommend
> coordinating the extension with the DID#, such that -- 800-555-1234
> corresponds to extension 2-1234, and 800-555-4637 can be dialed as
> 2-4637 internally.  Ditto for voice-mail.
> 
> And whatever you decide, make sure that 911 is idiot proof -- allow
> calling as 911, 7911, 9911, etc.
> 
> > -----Original Message-----
> > From: Tim Burt [mailto:asterisk-list at timburt.com]
> > Sent: Monday, February 07, 2005 4:46 PM
> > To: asterisk-users at lists.digium.com
> > Subject: [Asterisk-Users] How to number extensions - Which
> > way is best?
> >
> >
> > If this topic has been discussed already, please point me to
> > it.  I have looked, and I don't see any discussion in the
> > past couple of months or in the wiki.
> >
> > When setting up your inside extensions, it can be helpful to
> > choose the numbering carefully.  Ideally, you would like it
> > to not conflict with the dialing of an outside number.
> >
> > For example, the extension...
> >
> > 1212
> >
> > Is very similar to dialing a new york long distance number:
> >
> > 1-212-555.1212
> >
> > The phone company intentionally avoids some number
> > combinations.  Local numbers never start with a "1".  This
> > way, the Phone company switch knows that any number that
> > starts with a "1" needs long distance routing.
> >
> > ------------------
> >
> > Some switch systems avoid this issue by requiring that
> > extensions dial a 9 to get an outside number.  This allows
> > the use of any extension numbers internally, as long as they
> > do not begin with a "9"!
> >
> > I can setup asterisk to work this way.
> >
> > ------------------
> >
> > What would be a wise choice for your extension numbering if
> > you were just setting up a new system?
> >
> > Is there a "better to use" set of extensions, that avoids
> > confusion with dialing of external numbers.
> >
> > ------------------
> >
> > Or perhaps, I am way off base.  Does asterisk have some magic
> > sauce that makes this a moot issue?
> >
> > Thanks in advance. _______________________________________________
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