[cisco-voip] Troubleshooting Help

Thu Jul 5 14:51:41 EDT 2007

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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