[cisco-voip] 2port mft data and voice

Paul asobihoudai at yahoo.com
Wed Jul 30 18:24:12 EDT 2008


I read yesterday that the DI (drop and insert) cards are used for just that purpose...splitting the card between data and voice.



----- Original Message ----
From: Kris Seraphine <baryonyx5 at gmail.com>
To: Michael Thompson <mthompson729 at gmail.com>
Cc: cisco-voip at puck.nether.net
Sent: Wednesday, July 30, 2008 2:47:09 PM
Subject: Re: [cisco-voip] 2port mft data and voice

If you're referring to the clock source independent command for the
VWIC2's.  I'm pretty sure that cannot be used on a two port card
unless both ports are data.

On Wed, Jul 30, 2008 at 10:22 AM, Michael Thompson
<mthompson729 at gmail.com> wrote:
> There's 2 schools of thought on this one.
>
> If you have a VWIC-2MFT-T1, then the caveat of that card is that there's
> only 1 clock controller for the card.  Meaning, you HAVE to be using the
> same clock for both ports.
>
> In the VWIC2-2MFT-T1/E1 cards, there's actually discreet clock control
> hardware on the card.  If you use this version, then you should be fine.  If
> you use the older version, then you will have clock slips if you're using 2
> different clock sources.
>
> HTH
> MT
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jonathan Charles
> Sent: Wednesday, July 30, 2008 11:05 AM
> To: Voice Noob
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] 2port mft data and voice
>
> Don't do it.
>
> You will see slips on whichever port is not the clocking primary.
>
> A PRI gets its clocking from the ISDN switch. A PTP T1 gets its
> clocking from the remote router; a FR T1 gets its clocking from the
> frame switch....
>
> I have seen this dozens of times and always there are slips.
>
> Now, the question is, do these slips matter, well, they can...
>
> It is a gamble.
>
>
> Jonathan
>
> On Wed, Jul 30, 2008 at 8:22 AM, Voice Noob <voicenoob at gmail.com> wrote:
>> Can I use a 2port MFT card and bring a voice PRI in on one port and a data
>> T1 on the other port?
>>
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-- 
kris seraphine
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