[Asterisk-Users] Choosing an ISP for Asterisk

[Kerry Garrison]

Personal opinion here, but in an office of 50 users we just built, here is
what we did. First, the PBX was equipped with 4 analog lines that were setup
as a failover in case the T1 for voice data failed. Secondly, another 4
analog lines were dropped in a central location of the office with analog
handsets stored in a cabinet close by in case the entire network was down,
as well as the two fax machine lines both equipped with handsets. Now if I
was still really concerned about 911 calls after all this, I would issue a
memo telling everyone that in case of emergency, use your cell phone to dial
911 as out of 50 people, all but I think 4 people carry cell phones there.

As a sidenote to all of this, with 50 people, it was not practical to
combine both voice and data over the same line. Doing the math simply didn't
add up. We calculated a maximum usage at any one time being around 20 voice
calls. This justified bringing in a voice T1 into a digital line card.  

-Kerry


-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Adam Goryachev
Sent: Monday, March 21, 2005 2:27 AM
To: jhiver at ykoz.net; Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Choosing an ISP for Asterisk

On Mon, 2005-03-21 at 13:51 +0400, Jean-Michel Hiver wrote:
> >Ummm, in an office of x people, where x is some arbitrary integer > 
> >1, is 1 PSTN line for emergency services sufficient ?? Personally, I 
> >would think it isn't, but haven't quite determined what number is
sufficient.
> >
> >Consider, an office of 50 people, and a small fire breaks out, how 
> >many people will call the emergency number?
> >  
> >
> And how many calls are needed? Is calling the fire station 50 times 
> going to be more efficient? I don't think so...

Really?? What if you happen to be the 4th person calling, and need to inform
them that you are trapped in the stationary cupboard, and luckily you were
carrying the cordless handset (but not your mobile phone)??

At the end of the day, I wouldn't expect any office to have a 1:1 ratio
between users:phone lines, but there must be some ratio which would make
some sort of sense....

Also, it was a bit of a 'heads-up' for those people that thought they had
'solved' the problem by dropping a single phone line in, or plugging a 'red'
phone into the fax line, or some-such....

So, any useful comments... please post them.

Regards,
Adam
--
 --
Adam Goryachev
Website Managers
Ph:  +61 2 9345 4395                        adam at websitemanagers.com.au
Fax: +61 2 9345 4396                        www.websitemanagers.com.au

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