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Joined: May 2004
Posts: 244
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Joined: May 2004
Posts: 244 |
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
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Joined: Apr 2007
Posts: 18
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Joined: Apr 2007
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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!
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Joined: Aug 2005
Posts: 131
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Joined: Aug 2005
Posts: 131 |
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?
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Joined: Jun 2007
Posts: 2,106
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Joined: Jun 2007
Posts: 2,106 |
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.
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Joined: May 2004
Posts: 244
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Joined: May 2004
Posts: 244 |
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,
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Joined: Jun 2007
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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.
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Joined: Jan 2008
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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.
www.myrandomviews "Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about" Retired, taking photographs and hoping to fly one of my many kites.
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