I am not a VOIP expert but this is just an idea based on my other job and one at which I have lots of unplanned experience with.
>From my experience with running data over analog lines, I would say an analog modem is probably the best option. Modems are extremely sensitive to noise / etc on a analog link. They pick up things that our humans ears cannot. If there is noise you can hear the modem(s) renegotiating to a lower level which means you could use the speed at which the modems connect to judge the quality of the call. If the modem connect speed is say 28K, then you already know there is noise on the line. If the call completes with a 48K connect speed, then you have good voice quality. I say this because our PABX got hit by lightning once, and although the main boards got replaced ... I told the PABX techie, that I could hear a slight noise in the background when I was making calls. The noise was not there before. Of course, he listened and told me it was normal. Then the proof came. Every modem in the company which was connected to PABX extension could not make calls. You could hear the modem renegotiating at least three times before an acceptable transfer rate was set, which was 21Kbps instead of the 48Kbps we were used to. So I use that as a standard to judge line quality. Of course you use the debug commands to see at what speeds the modems are connecting at Just an idea. Manish -----Original Message----- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Sent: 17 July 2002 01:16 To: [EMAIL PROTECTED] Subject: RE: Voice of IP / Frame-Relay and remote labs [7:48947] Tangled Up in Blue wrote: > > Maybe this is not what you're asking, but when I test my voip stuff i > just call my cell phone. When he's first getting it working with basic FXS ports on a Cisco router, he probably won't have a gateway to the public switched network. So calling a cell phone won't work! ;-) I know there are some debug commands, just can't remember what they are. They tell you if the call works and maybe some quality too.... Priscilla Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49008&t=48947 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
