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i'm just dabbling into video, but apparently video is a 3rd type. the
primary difference for telco is b-channel bonding that can occur with
video. A single call on the d-channel can consume 2,3, or more
b-channels based on the isdn bearer capability.<br>
<br>
/wes<br>
<br>
Lelio Fulgenzi wrote:
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<div><font face="Arial" size="2">Definately two types of PRIs, voice
and data. but I believe they both run over the same L1/L2 and it's the
application layer ontop that differs. </font></div>
<div> </div>
<div><font face="Arial" size="2">I believe there have been some
advancements with gateway and IOS features that allows you to run both
voice and data over the same PRI. Or at least I think I've read about.</font></div>
<div> </div>
<div><font face="Arial" size="2">The great thing about about running
both voice and data over the same PRI is that in the event of a WAN
outage, you can use the data section to connect to your HQ. If you have
multiple PRIs for redundancy and capacity, using one whole PRI for
databackup will give you access to stuff like voicemail, etc. ACLs and
autodialiers should be able to get things working for you.</font></div>
<div> </div>
<div> </div>
<div> </div>
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<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">-----
Original Message ----- </div>
<div
style="background: rgb(228, 228, 228) none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>From:</b>
<a moz-do-not-send="true" title="svoll.voip@gmail.com"
href="mailto:svoll.voip@gmail.com">Scott Voll</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>To:</b>
<a moz-do-not-send="true" title="rkulagow@gmail.com"
href="mailto:rkulagow@gmail.com">Robert Kulagowski</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Cc:</b>
<a moz-do-not-send="true" title="cisco-voip@puck.nether.net"
href="mailto:cisco-voip@puck.nether.net">cisco-voip</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Sent:</b>
Thursday, February 14, 2008 5:31 PM</div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Subject:</b>
Re: [cisco-voip] Types of PRIs: "Voice", "Voice, Video and
Data","Unrestricted Digital"</div>
<div><br>
</div>
<div>someone can correct me if I'm wrong.... but my understanding
is there are two different types of PRIs: voice and Data.</div>
<div> </div>
<div>Voice PRI goes directly to the telco to go out on the PSTN.
Data can run to another location (ISDN) or to a telco. Since your
wanting to do Video you will then order a SPID (can't remember if
that's the right name or not) which is like a ISDN telephone number.
(my memory is really bad as this was in some CCNP classes I took about
6 years ago).</div>
<div> </div>
<div>Hope that helps.</div>
<div> </div>
<div>Scott<br>
<br>
</div>
<div class="gmail_quote">On Thu, Feb 14, 2008 at 2:06 PM, Robert
Kulagowski <<a moz-do-not-send="true"
href="mailto:rkulagow@gmail.com">rkulagow@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;">I've
got some confusion regarding ordering PRIs from the various<br>
carriers. With today's IOS, I can't use a 2851 as a H.323 to H.320<br>
gateway, but maybe someday I might, if that code ever comes out of beta.<br>
What I don't have an answer for is whether or not I need to order a<br>
different kind of PRI. As far as I know, a PRI is a PRI, and the B<br>
channel is just carrying bits, so for now I should be able to take a<br>
PRI, do some TDM add-drop and allocate channels to a video unit. But<br>
I'm getting different terminology from various PSTN phone companies.<br>
Some are saying, "Oh, that's a different kind of PRI". Some have no<br>
clue what I'm talking about. All of them want $$$ to even think about<br>
the question.<br>
<br>
So, if I'm going to order a PRI that I'd like to use for voice calls<br>
now, and for voice and video calls later, what do I need to tell the<br>
phone company?<br>
<br>
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