[cisco-voip] PVDM

Fri Dec 4 14:42:31 EST 2009

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>
<mailto:Hyoun.Kim at chartercom.com> 

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