[cisco-voip] VWIC-2MFT-T1 on 2821 for PSTN support

[Jim McBurnett]

Jose,
I would not recommend it for that application.
In my experience, the potential for echo and other problems come into
play.
Especially if you have an LD provide and a local provider coming into
the same VWIC.
 
Also check to see,but I think that VWIC may not be support for certain
configs under CCM.
I remember that Pre-4.0 SR somthing would not support MGCP on that card
on the ISR router.
 
Later,
Jim

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jose Robles
Sent: Wednesday, October 04, 2006 4:47 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] VWIC-2MFT-T1 on 2821 for PSTN support


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: 



*	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. 



http://www.cisco.com/en/US/products/hw/modules/ps2617/products_configura
tion_example09186a008052c920.shtml 


I've had clocking problems with slips errors on the controllers even
using the network-clock participate and select commands for example: 

network-clock-participate wic 0 
network-clock-select 1 T1 0/0/0 

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. 




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