[cisco-voip] PVDM

[Nick Matthews]

Easiest way:

'show voice dsp group all'

The last command should tell you how many allocation failures you have had.


-nick

On Fri, Dec 4, 2009 at 2:57 PM, Ryan Ratliff <rratliff at cisco.com> wrote:
> Look at the disconnect cause the router sends back for the failing call (TX
> -> DISCONNECT), then look hard at the difference in the Setup messages for
> the working and failing calls.
> -Ryan
> On Dec 4, 2009, at 2:42 PM, Kim, Hyoun S wrote:
> K, I got the log with the debug command.  The 1st log, named success.txt is
> a number that works.  The 2nd log, named fail.txt is the number that gives
> me the “Call cannot be completed or is disconnected” message.
>
> Does it look like what you think it is Ryan?
>
> Hyoun Kim
> Network Administrator I
> Charter Media - East Division
> 640 Broadmor Blvd, Suite 80
> Murfreesboro, TN 37129
>
> Email: Hyoun.Kim at chartercom.com
> Office: 615.217.6245
> Fax: 615.217.6255
>
> From: Ryan Ratliff [mailto:rratliff at cisco.com]
> Sent: Friday, December 04, 2009 1:06 PM
> To: Kim, Hyoun S
> Cc: Jim Reed; cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] PVDM
>
> Your failing inbound calls could be because your provider is trying to send
> a call to you on a b-channel that doesn't exist on your side.
>
> A 'debug isdn q931' for a failing call should confirm this.
>
> -Ryan
>
> On Dec 4, 2009, at 1:59 PM, Kim, Hyoun S wrote:
>
> Oh sorry.  The voice port on the router is PRI.  I noticed when configuring
> the channels on the PRI, I could only specify channels 1-14 (rather than
> 1-24).
>
> I know about the PVDM calculator, but this equipment was ordered by my
> manager and then given to me to deploy.  I can always try & pop in a new
> PVDM with more DSPs in the router, but I am trying to figure out why some
> numbers can’t be dialed (or can only intermittently be dialed).  I am not
> sure if the PVDM capacity is at fault or not.
>
> Hyoun Kim
> Network Administrator I
> Charter Media - East Division
> 640 Broadmor Blvd, Suite 80
> Murfreesboro, TN 37129
>
> Email: Hyoun.Kim at chartercom.com
> Office: 615.217.6245
> Fax: 615.217.6255
>
> From: Jim Reed [mailto:jreed at swiftnews.com]
> Sent: Friday, December 04, 2009 12:56 PM
> To: Kim, Hyoun S; cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] PVDM
>
>
> What kind of voice ports do  you have on the router?  Analog POTS or PRI
> or...
>
> If you don’t have enough PVDM capacity, you can’t configure all of the
> channels on the PRI or all of the POTS lines.  There is a DSP/PVDM
> calculator on Cisco’s website that will tell you how much you need for a
> particular configuration.  Based on your symptom description, I’m not sure
> that this is your problem but never say never.
> --
> Jim Reed
> Technology Wrangler
> Swift Communications, Inc.
> 970-683-5646 (Direct)
> 775-772-7666 (Cell)
>
> “Not only is it not right.
> It’s not even wrong.”
>        The Pauli Proverb
>         Wolfgang Pauli
>
>
> On 12/4/09 11:37 AM, "Kim, Hyoun S" <Hyoun.Kim at chartercom.com> wrote:
>
> What specifically happens (or can go wrong) when you do not have enough DSPs
> on your PVDM module for a VoIP deployment?  Like for instance, if you have
> about 24 phones + 1 VG204 and you used a C2811 router with (1) PVDM2-16 and
> (1) VWIC2-1MFT-T1/E1.
>
> I’m curious to know if the PVDM2-16 is my problem. I converted an office
> earlier this week to Cisco VoIP with the above equipment.  However, I’m
> finding that while outbound calls can be made (not sure how many
> simultaneously), I’m having a problem of people dialing in and getting a
> message saying that the call could not be completed or is disconnected.  I
> did not change any of the phone numbers and the number pool is the same.
>  The problem is random.  It occurs on some phones, then goes away.
>
> Any ideas?
>
>
> <image001.jpg>
>
> ________________________________
>
> Hyoun Kim • Network Administrator I – East Division
>
> 640 Broadmor Blvd • Suite 80 • Murfreesboro, TN 37129
> ' 615.217.6245 • ' 859.312.6941 • 7 615.217.6255 • * Hyoun.Kim at chartercom.com <mailto:Hyoun.Kim at chartercom.com>
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> <fail.txt><success.txt>
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