[cisco-voip] Weird call in VM..... Explain that?

[Chris Ward (chrward)]

So it was a direct call inward that got forwarded to VM (CFNA)? Then
perhaps they did just conference in your DID.

 

+Chris

Hosted Collaboration Solution TME

 

From: Scott Voll [mailto:svoll.voip at gmail.com] 
Sent: Tuesday, December 06, 2011 2:37 PM
To: Chris Ward (chrward)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Weird call in VM..... Explain that?

 

The call was from OUTSIDE our org.

 

it came in via a POTS line on our H323 GW and went to VM.  I really
thing that someone conferenced our number in by accident.

 

Scott

On Tue, Dec 6, 2011 at 10:54 AM, Chris Ward (chrward)
<chrward at cisco.com> wrote:

Assuming the CDR doesn't show a conference call made to voicemail, can
you go back into your CDRs and figure out which phone placed or received
that call that was recorded in voicemail and then search for as many
records as possible for that user and see if there were any abnormal
call clearings or anything out of the ordinary. Doing the same for the
GW might not be a terrible idea. Although, I am pretty sure CUC has that
RTP stream protection so that it doesn't accept streams from unknown
sources.

 

Any MTPs or anything like that in the call flows? Also, what is the
firmware version on the 7961?

 

+Chris

Hosted Collaboration Solution TME

 

From: Scott Voll [mailto:svoll.voip at gmail.com] 
Sent: Tuesday, December 06, 2011 1:31 PM
To: Chris Ward (chrward)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Weird call in VM..... Explain that?

 

2811 H323(15.1T) -- CM 7.1.5 -- (sccp) 7961 -- (non-sip) UC 8.5

 

Scott

On Tue, Dec 6, 2011 at 9:32 AM, Chris Ward (chrward) <chrward at cisco.com>
wrote:

I saw a case like this a long time ago when I was in TAC. Basically, a
customer was reporting that they received VMs of entire conversations,
in my case it was the conversation of a VP within the company, which was
less-than-optimal for the customer.

 

It turned out that when certain devices encounter a TCP connection
failure (unregister) while streaming audio, they would forever stream an
additional audio stream to that IP and port until the device was
cold-rebooted. In this case it was a legacy VM device that DPA that
wasn't filtering out audio streams that were not from the current audio
session and the 7970 the defect that when unregistered, would continue
to send an additional audio stream (CSCsj99361).

 

We were able to finally track down the bug by using CDR records and the
voicemail to determine who's phone we were hearing and then looking for
that phone's calls before the cross-talk was heard.

 

So, let me ask, what are the details of this deployment? Voicemail
system, phones in use, integration type, and versions for all.

 

At any rate, this totally changed my perception that cross-talk is not
possible in an IP environment. J

 

+Chris

Hosted Collaboration Solution TME

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Scott Voll
Sent: Tuesday, December 06, 2011 12:20 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Weird call in VM..... Explain that?

 

We received a VM this morning when checking a branch VM box.

 

Basically the VM sounded like a full conversation between two people
(possible a bank being one side) and the whole conversation is there
including MoH that is not ours either.  we are on the west coast and the
call came in from Kansas.  we see the call in CDR's on CM.

 

What the hey happened?  ideas?

 

Only thing I can guess is that we got conferenced in, incorrectly, or
the telco has some major issues.

 

TIA

 

Scott

 

 

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