VOIP for Professionals (or...those closely resembling them)

BeerCheeze · Posted: Mon, 17 Jul 2006 16:07:37 Post Subject:

T-Shirt... just in case you don't know... I actually work on 9-1-1. Also VoIP and 5 9's isn't possible. And VoIP 9-1-1 I don't even think 2 9's are realistic.

I wish I could tell you why, and go into details, but I can't. Look up "911 provider" on google, click on the 1st link and you can figure out who I work for (You'll have to dig a little but it's in there).

So... tust me... I'm not over the deep end. 9-1-1 VoIP is not something I would ever risk mine, or my families life on. It COULD be, but it's not, nor will it probably ever be.

LaTech · Posted: Mon, 17 Jul 2006 16:10:51 Post Subject:

This is what we have: T1 with another connection between our office here and one 2 hours away (or that's how it was explained to me...). Now, if I'm understanding what I'm reading, the T1 isn't going to be enough considering we would be routing all the remote traffic through our building on top of the existing network traffic (which is substantial...we throw around HUGE files all day long in house and to our other building). Looking at it that way, we aren't going to have anywhere near enough bandwidth...unless we added another dedicated T1 just for phones (right?). The fax machine thing and the 911 are major concerns considering the amount of faxing that does happen here.

Time to do a pro con list and see what I can decided. Upgrading the existing PBX might be a MUCH better idea.

BeerCheeze · Posted: Mon, 17 Jul 2006 16:22:15 Post Subject:

LaTech, you can implement QoS (if your routers support it that is) and you can give higher priority to the SIP & RTP traffic, so the quality of the voice calls are good. However, it will make your file transfers a lot slower.

Faxes, are... maybe's. We at home send faxed over our VoIP line (it's not business critical, and it's "free" so we do it).

I do believe that their are VoIP solutions that you can send LD over the VoIP and local over land lines. Which might be a better option. Unfortunately I am not a VoIP PBX expert, and have limited professional VoIP experience outside the 9-1-1 world.

knight0334 · Posted: Mon, 17 Jul 2006 16:27:12 Post Subject:

not gonna tell ya how to your job.. ..just a suggestion though, provide them realistic costs to VOIP and PBX alternatives - but also give them the costs of bandwidth requirements for that many VOIP lines.

what kind of circuit is that T1? fractional voice/IP? full IP? or 24 voice channels?

With absolute lowest quality settings for 50% of lines available in use, 3Mb might do it.. I'd lean toward 4.5Mb though..

BeerCheeze · Posted: Mon, 17 Jul 2006 17:08:15 Post Subject:

Here's a bandwidth Calc for you

http://www.bandcalc.com/

knight0334 · Posted: Mon, 17 Jul 2006 17:14:31 Post Subject:

70 lines = 5600kbps.. I dont think I was far off in my guestimate.

....and why haven't you offered that linky before???

Smile

BeerCheeze · Posted: Mon, 17 Jul 2006 17:26:55 Post Subject:

I dunno.

But you don't need to plan for 70 lines, probably. You'd actually have to ask them. How many lines do they currently have? I bet you it's maybe 10.

T-shirt · Posted: Mon, 17 Jul 2006 18:57:32 Post Subject:

T-shirt · Posted: Mon, 17 Jul 2006 19:29:20 Post Subject:

BeerCheeze · Posted: Mon, 17 Jul 2006 19:50:47 Post Subject:

There are some advances in VoIP 911 coming, and they are an improvement, but while they are better on the location stuff, the back end (and the fact it's going over the Internet) is the problem.

(And I changed the order... I liked the Wednesday ones... A LOT!)