Re: [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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