Can anyone tell me of a cheap and effective way, to test a voip system for QOS or troubleshoot for audio problems.

Got some issues at a customer site. Tried all the ip echo settings on the equipment. It has helped some, not completely. Caller will get one audio and clipping audio.

I tried eitherreal and wirer shark. Didn'tshow or help.

Thanks in advance.

Mike

It may be an impedance mismatch between the phone and SLIC circuit.

An easy way to verify this is to parallel a buttset with the station phone, go off hook with station phone, when echo is observed, go off hook with the buttset. If the echo disappears, impedance mismatch is the culprit. Mr. Sandman make a device call the Echo Stopper, and an excellent solution for the problem.
Hope this helps!

1) What type of QoS mechanism is currently deployed?
2) Do you have seperate VLANs for voice and data?
3) What type of WAN circuit are you using?
4) What codec are you using?

PingPlotter will let you traverse the network and give you VoIP relative feedback (jitter, packet loss over time, etc).

The only other thing is to simulate an actual VoIP connection with something like Bing or SIPp.

I found the sipp program. I will give it a try. I can't find any reference to bing, except for crosby. What is bing.

Thnaks,

Yeah, it's a little known utility.

Here's a web-page for it: https://nixbit.com/cat/system/networking/bing/


Running SIPp and PingPlotter simultaneously will yield good empirical results as well.

Public or private WAN? or LAN voip? There is no QOS on a public WAN. If Lan then what kind of switches are you using? What kind of data apps are using the LAN? Many, many factors to consider.