[cisco-voip] Troubleshooting Help

Thu Jul 5 20:57:46 EDT 2007

Had the phone company in late today.  They are convinced it was not them.  I
guess they can see all the way to their CSU/DSU and all the way back to the
CO, no errors at all all day long.  So they are pointing the finger at my
internal network!  One thing I did see, is that the CPU utilization of the
2801 with the PRI hit as high as 80% early this morning.  I am thinking this
could have done it.  (This 2801 is also the def gateway for the network,
though the network is quite small, only about 60 total PCs and phones).

So I guess time to open a case with TAC.

On 7/5/07, kent <nws at fredf.org> wrote:
>
> I had a similar issue to the one your describing, The good news, well
> maybe... I got to trouble shoot it while the 1000 user call center was
> tring to answer the calls.  (Talk about fun!)  anyway the problem came
> down to a bad media termination point.  After x number of calls hit,
> then the weird ness started.  1 way audio etc.
>
> also, there are lots of known issues with the 12.3 train and weird audio
> problems.  TAC suggests you get up to the 12.4 code to fix most of the
> voice stuff.  You might just have a bad dsp module.   Also, if you have
> MTP required for your gateway.  (not sure if thats an option for mgcp
> like h323 at the moment)  you probably don't need to use them, but
> depends on your environment.
>
> Also, I know theres a rush ususally to fix the issue, when it happens,
> but alot of times if you can reproduce the problem with your phone and
> run a sniffer, you might be able to see whats happening buy the ip
> address of the streams.
>
> Also, TAC said on the 12.3 code, that putting the user on hold and then
> taking them back off, might correct it to.    but I cheated, I removed
> the MTP option and upgraded to 12.4 code.  :)
>
>
>
>
>
>
> Paul Choi wrote:
> > Is your 2801 receiving the digits from the LEC
> > properly? Is the PRI cable damaged at all?
> >
> > --- Todd Franklin <toddnh65 at gmail.com> wrote:
> >
> >
> >> Version 12.3(11)T9
> >> MGCP
> >>
> >> On 7/5/07, Voll, Scott <Scott.Voll at wesd.org> wrote:
> >>
> >>>  VGW = Voice Gateway = 2801 with PRI
> >>>
> >>>
> >>>
> >>> What version on the 2801 with PRI?  Running H323
> >>>
> >> or MGCP
> >>
> >>>  ------------------------------
> >>>
> >>> *From:* Todd Franklin [mailto:toddnh65 at gmail.com]
> >>> *Sent:* Thursday, July 05, 2007 10:19 AM
> >>> *To:* Voll, Scott
> >>> *Cc:* cisco-voip at puck.nether.net
> >>> *Subject:* Re: [cisco-voip] Troubleshooting Help
> >>>
> >>>
> >>>
> >>> The PRI terminates on a separate 2801.  My CCM is
> >>>
> >> a 4.2sr5a (from what I
> >>
> >>> can gather!)  I don't know what VGW means, is the
> >>>
> >> VGW something to do with
> >>
> >>> the 2801?  I have no errors about a lack of DSPs,
> >>>
> >> when we did run low on
> >>
> >>> them, that usually got logged in CCM.  There is no
> >>>
> >> firewall between CCM and
> >>
> >>> the PRI.
> >>>
> >>> Thanks for the ideas!  I am now looking and
> >>>
> >> digging!!
> >>
> >>>  On 7/5/07, *Voll, Scott* <Scott.Voll at wesd.org >
> >>>
> >> wrote:
> >>
> >>> Where is the PRI terminating on?  the same 2801?
> >>>
> >>>
> >>>
> >>> What version of CM / VGW w/ PRI?
> >>>
> >>>
> >>>
> >>> Do you have enough DSP's?
> >>>
> >>>
> >>>
> >>> What codec is being ran in region and VGW?
> >>>
> >>>
> >>>
> >>> Any Firewalls between phone / CM / VGW?
> >>>
> >>>
> >>>
> >>> Scott
> >>>
> >>>
> >>>  ------------------------------
> >>>
> >>> *From:* cisco-voip-bounces at puck.nether.net
> >>>
> >> [mailto:cisco-voip-bounces at puck.nether.net]
> >>
> >>> *On Behalf Of *Todd Franklin
> >>> *Sent:* Thursday, July 05, 2007 9:58 AM
> >>> *To:* cisco-voip at puck.nether.net
> >>> *Subject:* [cisco-voip] Troubleshooting Help
> >>>
> >>>
> >>>
> >>> Hey everyone.  I will try to keep this short, but
> >>>
> >> supply as much
> >>
> >>> information as possible.
> >>>
> >>> On june 28th, and again today on July 5, we have
> >>>
> >> had this issue:
> >>
> >>> If you are outside, and call in on a line that
> >>>
> >> comes in on our PRI, the
> >>
> >>> person receiving the call cannot hear you at all.
> >>>
> >> Yet you can hear them
> >>
> >>> perfectly.
> >>> If you are outside, and call in on a line that
> >>>
> >> comes in our PRI with an
> >>
> >>> automated attendant, no input is accepted.  (i.e.
> >>>
> >> Press 1 for this, 2 for
> >>
> >>> that, if you press a key, the greeting just keeps
> >>>
> >> going.  If you dial an
> >>
> >>> extension, the greeting just keeps going).
> >>> If you are inside, and dial out (we use a 9 to get
> >>>
> >> an outside line, this
> >>
> >>> puts you out on the PRI), the phone will show that
> >>>
> >> the call is connected,
> >>
> >>> yet you cannot hear anything at all.  No phone
> >>>
> >> ring, nothing.
> >>
> >>> Today, I pressed 9, and dialed the automated
> >>>
> >> weather phone in town, I got
> >>
> >>> connected to an Engineering firm 15 miles away.  I
> >>>
> >> hung up, dialed the same
> >>
> >>> weather phone, and got the very same Engineering
> >>>
> >> firm 15 miles away.
> >>
> >>> Also today, occasionally I would pick up my
> >>>
> >> handset, and be right in the
> >>
> >>> middle of someone's phone conversation.
> >>> In both cases, if you call in to a line that is
> >>>
> >> POTS going into a 2801,
> >>
> >>> you are fine.  And if you call out using a POTS
> >>>
> >> line, you are fine (even
> >>
> >>> though the POTS outbound line is on a 2801).
> >>>
> >>> All this led me to believe it was a phone company
> >>>
> >> issue, yet the assure me
> >>
> >>> it was definitely not.  I had not rebooted my CCM
> >>>
> >> in over a year, so I
> >>
> >>> rebooted it.  Both instances, in less than an
> >>>
> >> hour, things go back to
> >>
> >>> normal, but needless to say, the issue is killing
> >>>
> >> me!  Where would I start
> >>
> >>> to look for ideas on what is happening??
> >>>
> >>> Would appreciate any help at all!
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>>
> >> cisco-voip mailing list
> >> cisco-voip at puck.nether.net
> >> https://puck.nether.net/mailman/listinfo/cisco-voip
> >>
> >>
> >
> >
> >
> >
> >
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