[Asterisk-Users] Problem with call drops

[Mojo with Horan & Company, LLC]

Have you watched the output of zttest to make sure your interrupts are 
firing adequately?

Waldo Rubinstein wrote:
> Hello guys,
> 
> I've been having a a recurring problem with people complaining about  
> calls being dropped.
> 
> I have 3 asterisk servers:
> 
> Gateway: running Asterisk 1.2rc2 with TE410P connected to 4 T1s of  
> the PSTN
> Server 1: running Asterisk 1.2rc2 with ztdummy using Gateway to  
> access the PSTN (in/out)
> Server 2: running Asterisk 1.0.9 with ztdummy using Gateway to access  
> the PSTN (in/out)
> 
> I have agents connected to both Server 1 and Server 2.
> 
> The problem is that every once in a while, agents complain that their  
> calls dropped. Sometimes it's some agents that complaint, some other  
> times, ALL agents complaint at the same time.
> 
> When these complaints occur, the only thing I so is:
> 
> 1) Issue a show channels on all three servers to see if there are any  
> ongoing calls. I assume that if there are active calls, that not all  
> calls dropped
> 2) Issue dmesg in Gateway to see if any of the T1s presented an alarm  
> that could have dropped the calls
> 
> In either case, I don't see any errors in dmesg indicating there were  
> problems with the T1s and I always see active calls in all the servers.
> 
> What can I do to further troubleshoot this? If I look at the CDR, how  
> can I tell that a call was "abnormally" terminated? Are there any  
> tools out there that would allow me to check the health status of the  
> working system and not just the "availability" of the machines? I was  
> looking at nagios but I don't know if it will do what I need to do.
> 
> The other thing I could think of is that there may be a network  
> problem in the building. The way everything is connected is all  
> agents are connected to a series of unmanaged switches in the "call  
> center floor", which are daisy chained together and then one is  
> connected to the main switch with a single cable drop. The main  
> switch is where the Asterisk servers are connected. I figured that if  
> one of the switches in the call center area fails, it could drop all  
> calls or if there is a problem with the cable drop from the main  
> switch, that could also affect all agents.
> 
> Any advise will be greatly appreciated.
> 
> Thanks,
> Waldo
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-- 
Mojo <mojo at horanappraisals.com>
Office Manger, Horan & Company, LLC
(907) 747-6666 x112