[Asterisk-Users] Asterisk 1.2 problems

[Waldo Rubinstein]

I have similar problems with call drops.

I don't know if "Shadow Ping" is some kind of pinging software. I  
have run a lot of flood pinging and everything comes back just fine.  
I don't have Cisco phones, I use Softphones and it's the only  
application running on the PCs (aside from MS Windows and whatever it  
runs in the background).

I notice the problem mainly on the softphones. I also have some  
Uniden hardphones that don't seem to present the same problems. The  
softphones are eyeBeam. I wonder if it's a bug in the softphone or  
simply that the machines could be infected with some virus or  
something like that. It happens randomly (with a lot of calls or few  
calls, some PCs yes and some PCs no).

Could this still be network related?

Thanks,
Waldo

On Dec 2, 2005, at 5:17 PM, jonc wrote:

> I do run Ethereal on mine when looking for real-time problems. It's
> great for helping you see what is going on at the packet level, but it
> is the wrong tool for measuring Latency/QOS problems.
>
> Shadow Ping works fairly well for measuring latencies. In earlier  
> times
> I used to just run a quasi-flood ping to the offending phone (10
> pings/second) and look for latency variations and dropped packets.  
> On a
> clean network with no problems there should be NO dropped packets, and
> latency variations should be minimal.
>
> You'll find some interesting problems that accompany the use of cheap
> unmanaged switches (and please don't tell me you are trying to use
> hubs!).
>
> For our setups we use either Cisco 2900XL-EN or Cisco 3500 series
> switches.  This come with built in VoIP detection at the port level
> *and* allow us to use VLANs to separate out Voice and Data. They are
> champion workhorses and using them lets us also run single wire to the
> desktop (running the PC off the pass-thru switch on the back of the
> phone).

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