[cisco-voip] PVDM

[James Buchanan]

Hello,

They are taking the 16-channel DSP and upgrading it to 32-channels.

The number of DSP channels you need depending on how many channels of the
PRI you intend to use, plus conferencing and transcoding. This particular
VWIC card can do 60 channels as an E1 and 48 channels as a T1. Do you
intend to configure two PRIs? If so, you need one DSP channel per T1/E1
channel as a minimum. I would recommend upgrading the 32 channels to a
minimum of 96 channels so that you have enough resources for both T1/E1
ports plus transcoding and conferencing.

Now, the number of DSP channels also depends on what codec you intend to
use. For example G.729 is a high-density codec, meaning that more DSP
channels might be required for transcoding. G.729b does not use as many DSP
channels.

I hope this helps!

James


On Wed, May 21, 2014 at 9:14 AM, Abebe Amare <abucho at gmail.com> wrote:

> Hi everyone,
>
> The following is a snippet from the detail order for Cisco 2901 voice
> router:
>
> 1. C2901-CME-SRST/K9 - 2901 Voice Bundle w/ PVDM3-16,FL-CME-SRST-25, UC
> License PAK
> 2. PVDM3-16U32 - PVDM3 16-channel to 32-channel factory upgrade
>
> What does the PVDM3-16U32 mean? is it a separate PVDM or license? also if
> I want to purchase a VWIC3-2MFT-T1/E1, what is the PVDM3 type I have to
> get? (I dont have the right login credentials to use DSP calculator)
>
> best regards,
>
> Abebe
>
>
>
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