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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adam Goryachev Sent: Monday, March 21, 2005 2:27 AM To: [EMAIL PROTECTED]; 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 [EMAIL PROTECTED] Fax: +61 2 9345 4396 www.websitemanagers.com.au _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
