[cisco-voip] Verizon SIP vs. PRI?

Tue Feb 8 19:08:37 EST 2011

Are you using CCM session management edition for that customer or is it just one 
cluster with a lot of centralized SIP trunks? I'm just asking out of curiosity 
since I've never heard of anyone using session management edition....yet.

________________________________
From:Bob Zanett (US) <bob.zanett at us.didata.com>
To:Matthew Loraditch <MLoraditch at heliontechnologies.com>; David Eco 
<david.eco at msn.com>; "matthew at ciscovoiceguru.com" <matthew at ciscovoiceguru.com>; 
"notariannil1 at scranton.edu" <notariannil1 at scranton.edu>
Cc:"cisco-voip at puck.nether.net" <cisco-voip at puck.nether.net>
Sent: Tue, February 8, 2011 1:08:13 PM
Subject: Re: [cisco-voip] Verizon SIP vs. PRI?

I have helped to design, architect and deploy multiple customers with SIP, 
including SIP trunks carrying contact center calls and also business user 
calls.  I helped to build out the initial infrastructure of a global medical 
device firm that almost has all of their US remote offices – literally 100s – 
migrated onto their centralized SIP trunks.   

Are there interoperability issues?  Yes, as each vendor can speak a slightly 
different dialect.  However, with the onset of some very nice Border Gateways – 
it is making this a non-issue.  However, as Matthew states below – you need to 
work with someone who knows what they are doing.

For instance, ROI can be a grey area.  Many times, it is simply a wash and at 
other times can save a tremendous amount.  Like the example above, each of the 
remote sites had a least a PRI.  However, many of the offices hardly used 12 
b-channels.   By centralizing, they are seeing a very nice savings and they get:
·         Centralized dial plan management
·         Centralized DID control and management
·         On-the-fly call volume adjustment – it is now bandwidth not copper in 
the ground
·         Economy of scale

http://www.callcentertimes.com/LatestNews/tabid/59/ctl/NewsArticle/mid/407/CategoryID/1/NewsID/173/Default.aspx

Cheers,

Bob 

Solutions Architect
Customer Interactive Solutions
Dimension Data

From:cisco-voip-bounces at puck.nether.net 
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Matthew Loraditch
Sent: Tuesday, February 08, 2011 2:29 PM
To:David Eco; matthew at ciscovoiceguru.com; notariannil1 at scranton.edu
Cc:cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Verizon SIP vs. PRI?

The thing I would say is it all depends on your level of comfort with the 
Carrier and with SIP. I generally don’t have a problem with the quality of the 
service when it works, the problem has been troubleshooting and making it work 
in the first place. I understand how to debug and troubleshoot a T-1 or PRI and 
can set one up H.323 or MGCP no problem. SIP just doesn’t process for me, 
Everybody says it’s simple, plain text and all that but I don’t get it. 

My point, If you are going with it make sure you or someone you have understands 
it.

If you have a smaller install one thing you can do is have the provider put in 
an IAD and hand off as PRI. Make them responsible and make your side something 
you understand. Obviously in a large campus environment that may not be feasible 
and defeats some of the consolidation benefits but in a smaller setup it can 
make life much easier.

Matthew Loraditch, CCVP, CCNA, CCDA
1965 Greenspring Drive
Timonium, MD 21093 
support at heliontechnologies.com
(p) (410) 252-8830
(F) (443) 541-1593

Visit us at www.heliontechnologies.com 
Support Issue? Email support at heliontechnologies.com for fast assistance!

From:cisco-voip-bounces at puck.nether.net 
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of David Eco
Sent: Tuesday, February 08, 2011 2:47 PM
To:matthew at ciscovoiceguru.com; notariannil1 at scranton.edu
Cc:cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Verizon SIP vs. PRI?

with SIP, you may get more capacity of the channel. But in our case, we have to 
setup IPSEC VPN with Verizon to utilize their SIP Trunk. Network has to be 
reliable.

David

> From: matthew at ciscovoiceguru.com
> Date: Tue, 8 Feb 2011 13:43:34 -0600
> To: notariannil1 at scranton.edu
> CC: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Verizon SIP vs. PRI?
> 
> One of my biggest questions right now regarding SIP trunks has been data 
>circuit issues and usability in SRST mode. If your branch office loses it's 
>network connection, will your SIP trunk go down too? If so, then you're up the 
>creek without a paddle.
> 
> Sent from my iPhone
> 
> On Feb 8, 2011, at 1:13 PM, Lisa Notarianni <notariannil1 at scranton.edu> wrote:
> 
> > We currently utilize PRI trunks as fail over and backup. They connect to our 
>6509's.
> > 
> > Can anyone share their thoughts on SIP vs. PRI services. 
> > 
> > Thanks,
> > 
> > Lisa
> > -- 
> > <LNsignature.jpg>
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> 
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