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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The preferred solution would have a ISR
for each telco carrier. I also like to make voice gateways just voice
gateways. Not data routers.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Jason Aarons (US)<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, October 11, 2006
12:01 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Jose Robles;
cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip]
VWIC-2MFT-T1 on 2821 for PSTN support</span></font><o:p></o:p></p>
</div>
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12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Not if all 4 T1s are clocking line. The
ISR DSPs and backplane can only have a single clock source (show network
clocks). Different carriers have different clocks. You could put the second set
of T1s on a NM-HDV and it seperates the DSPs from the backplane clocking.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If the second provider lets you send them
clocking (clock source internal) it would work. They would have to clock from
you, I doubt they will support this.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Clocking problems show up in
modem/fax/credit card communication with slip/errored seconds failures.
If it was voice calls only then the clocking problems might not be noticeable.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Jose Robles
[mailto:jose.robles@netxar.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, October 11, 2006
11:53 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Jason Aarons (US)<br>
<b><span style='font-weight:bold'>Subject:</span></b> VWIC-2MFT-T1 on 2821 for
PSTN support</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Hello Jason and sorry to bother you with this one. But let's say we
have 2 VWIC-2MFT-T1 on the same ISR router making them 4 T1's and I have one
VWIC-2MFT-T1 with 2 T1's to one provider(the same provider both T1's on the
VWIC) and the other VWIC-2MFT-T1 with 2 T1's on other provider. Would this
scenario be supported and shouldn't receive slip errors at all? This without
any NM-HDV or another hardware. Up to now you gave me the most clear answer
with the clocking issues. Thanks for all your help.</span></font> <br>
<font size=2><span style='font-size:10.0pt'><br>
<br>
<br>
<br>
<b><span style='font-weight:bold'>---------- Original Message -----------</span></b>
<br>
From: "Jason Aarons \(US\)" <<st1:PersonName w:st="on">jason.aarons@us.didata.com</st1:PersonName>>
<br>
To: "Jose Robles" <jose.robles@netxar.com>,
<cisco-voip@puck.nether.net> <br>
Sent: Wed, 4 Oct 2006 21:55:30 -0400 <br>
Subject: RE: [cisco-voip] VWIC-2MFT-T1 on 2821 for PSTN support <br>
<br>
> <br>
<defanged_meta content="text/html;
charset=iso-8859-1" http-equiv="Content-Type">>
<br>
> </span></font><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>So long as both voice T1s have same clock
source. Check with your telco if clock source is the same. I have this working
in many places. However when the two T1s have different clocks it won't work
with voice.</span></font><font size=2><span style='font-size:10.0pt'> <br>
> <br>
> </span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Two data T1s can have seperate clock sources is what the
enhanced clocking means.</span></font><font size=2><span style='font-size:10.0pt'>
<br>
> <br>
> </span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The ISR backplane with the DSPs only allow one clock source
for voice total. You need to add a NM-HDV/MFT if you have voice with another
clock source. Say a local voice T1 and a long distance voice T1 from another
carrier.</span></font><font size=2><span style='font-size:10.0pt'> <br>
> <br>
> <o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net on behalf of Jose Robles <br>
> <b><span style='font-weight:bold'>Sent:</span></b> Wed 10/4/2006 4:46 PM <br>
> <b><span style='font-weight:bold'>To:</span></b>
cisco-voip@puck.nether.net <br>
> <b><span style='font-weight:bold'>Subject:</span></b> [cisco-voip] VWIC-2MFT-T1
on 2821 for PSTN support <br>
> </span></font><font size=2><span style='font-size:10.0pt'><br>
> <br>
> Hi. Does anyone knows for sure if this T1 (2 port) Multi-Flex Trunk WAN
daughter card VWIC is supported using the 2 T1 ports for voice to the PSTN??? I
read a docuement which I'm not clear with what it says: <br>
> <br>
> <o:p></o:p></span></font></p>
<ul type=disc>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l1 level1 lfo3'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Enhanced clocking capabilities--The 2-port MFT
VWIC2s can enable each port to be clocked from independent clock sources
for data applications. This independent clocking capability is not
supported for voice applications and not supported with the AIM-ATM-VOICE-30
module. <o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'><br>
> <br>
>
http://www.cisco.com/en/US/products/hw/modules/ps2617/products_configuration_example09186a008052c920.shtml
<br>
> <br>
> I've had clocking problems with slips errors on the controllers even using
the network-clock participate and select commands for example: <br>
> <br>
> network-clock-participate wic 0 <br>
> network-clock-select 1 T1 0/0/0 <br>
> <br>
> In this scenario controller T1 0/0/0 will give me no errors but 0/0/1 will
have slips for example. I can live with this errors but faxes don't. <br>
> <br>
> <br>
> <o:p></o:p></span></font></p>
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> <strong><b><font face="Times New Roman">Disclaimer: This e-mail
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<b><span style='font-weight:bold'>------- End of Original Message -------</span></b>
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