For your benefit and anyone else who isn't already aware, ethereal is an awesome tool for doing network analysis.
After you capture a call look in the "analyze" menu and select RTP (not SIP as you might think). Ethereal will show you the RTP streams it has found. Click on a RTP stream and select "Find Reverse". Then click analyize and ethereal will show you all kinds of information about the packets including jitter etc. and it draws a nice graph. (I might be missing a step or two here but you'll figure it out) You can even click "save payload" and save the conversation as a sound file so you can listen to it. It comes in both a Windows and a Linux version. You can also capture packets with tcpdump and analyze them later with ethereal. John On Thu, 2006-08-17 at 14:16 -0400, Scott Ivory wrote: > Thanks for your response.. > Same version of asterisk I was running before.. > I'm leaning towards the problem being related to the network. > What's the easiest way to do 'a packet analysis'? > > Scott > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Thursday, August 17, 2006 12:30 PM > To: [email protected] > Subject: Re: [on-asterisk] poor call quality after rebuild > > From what version of asterisk did yo upgrade, if you where running an > older copy chances are,you are now running a different echo cancellor, > and you will probably have to readjust your rx and tx gains. > Jitter however sounds network related, have you done a packet analysis > on your connection? > > Phil. > > > Quoting Scott Ivory <[EMAIL PROTECTED]>: > > > Hi All, > > > > After rebuilding my Asterisk box, I seem to be having some call quality > > issues. Mostly intermittent jitter and some static. There are only two > > users of this particular system. I didn't seem to have any problems > before > > the rebuild (aside from the hardware issues that prompted the rebuild). > The > > new box is an IBM NetVista with a 2.4 GHz processor, 384 MB of RAM running > > Trixbox v1.1. > > > > I ran top to see what the CPU/memory load is while on a call and it never > > goes above 3 percent. Memory also looks good. > > > > I'm on Rogers hi-speed, so bandwidth shouldn't be a problem. When I run > > bandwidth tests I average about 2.5 megs down 600k up (far from the 6/800 > > I'm supposed to get) > > > > Are there any utilities that I can use to help further diagnose the > problem? > > > > Thanks again! > > > > Scott > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] >
