[cisco-voip] Getting started in SIP...

[Dennis Heim]

It also matters what size of sites you are using. I am more comfortable with SIP trunks for small sites. It also have to do with what type of connection your last mile is. If you got fiber to the prem, then BW really will not be as big of an issue, as opposed to have a couple of T’s.

Dennis Heim
Network Voice Engineer
CDW  Advanced Technology Services
11711 N. Meridian Street, Suite 225
Carmel, IN  46032

317.569.4255 Office
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dennis.heim at cdw.com<mailto:dennis.heim at cdw.com>
www.berbee.com<http://www.berbee.com/>

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Tuesday, April 06, 2010 1:46 PM
To: Robert Kulagowski
Cc: Cisco VOIP
Subject: Re: [cisco-voip] Getting started in SIP...

I think you'll get quite a few opinions on this, here are mine:

 *   SIP is not as "cost effective" as you might think, unless you already have internet access from your SIP provider. Typically, your ISP will want to limit the amount of voice on the link so you will have to purchase more bw and it will sit idle.
 *   SIP is not as "feature rich" as current PRI technology is, so there will be issues with conferencing, holding, faxing, etc.
These opinions are based on our local SIP providers (and about 6-12 months ago at that).

Things to think about:

 *   what equipment will you need to run this SIP trunk (3945, CUBE, DSPs, etc?)
 *   what features will you lose/gain if you move to SIP
 *   what are the full costs
 *   what about reliability, quality, etc?


---
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: "Robert Kulagowski" <rkulagow at gmail.com>
To: "Cisco VOIP" <cisco-voip at puck.nether.net>
Sent: Tuesday, April 6, 2010 1:21:37 PM GMT -05:00 US/Canada Eastern
Subject: [cisco-voip] Getting started in SIP...

Are there things that folks are doing to get familiarized with SIP
trunking from providers without committing to a 1 year contract?  Is
there a way to experiment "in house" that is applicable once you get a
SIP trunk from a provider?  Still trying to determine if there's a
cost justification in moving from a TDM-style PRI configuration to a
SIP trunk configuration.  Or is it not a cost justification that's
driving this train?
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