viciECHO

[ruben23]

Hi guys i have VICIDIAL single server with config of:
Asterisk 1.4.30-vici
Dahdi-current version
VERSION: 2.4-253
BUILD: 100507-1102
SIP_trunk
Scracth_iinstall
Ubuntu-8.04-LTS


I have currently facing problem regarding echo problem during all my calls, which when i call a client they hear a great echo on voice but on my end no echo present at all, and this happens frequently.

Are there workaround regarding about this..?
I come across a project called OSLEC- can this be implemented and would help for this purpose of problem.? any idea please..

[williamconley]

i have not had a complaint regarding echo in a while. how long has your server been operational, and when did the echo begin.

is this for all agents on all workstations, or on specific agents (as in: certain computers, headsets, agents ...?)

when situations like this occur, by the way, a LOG (write it in crayon on napkins if you have to) is very helpful. it often leads you to your problem. each time an agent/client complains of echo, write down as much information regarding the specific call as you can (agent, workstation, phone, headset, carrier, date/time, everything). after you have 10 or so you will likely find the direction to concentrate your search.

it may well be the asterisk server itself, but that would not be "vicidial", that would be "asterisk" (which has a much wider user base for these questions). but given the odds it is not.

thank you for posting all your specs!

if you want anyone to check out a possible "software package" as a solution, a LINK to the solution is generally a good idea. even if you use the word "dot" instead of actually putting the URL and leave off the http://, we can find it that way and possibly render an opinion .

[ruben23]

@williamconley

Server been operational for about 4 months and on my first 2 weeks of operation its working fine but on the next week that's where i keep getting echo problem on the client far end.

-But nothing have been change on the config of the dialer itself aside i have tested it to 3 different voip carrier and all 3 still getting the echo sometimes its fine but mots of, i get echo.

what i mean OSELEC project is this -->

http://www.rowetel.com/blog/?page_id=454

Opensource Echo canceller.

[williamconley]

looks to me like that is for hardware based echo issues

are you using a digium or sangoma card?

if your configuration didn't change, did your headsets? did your physical room layout change?

[ruben23]

looks to me like that is for hardware based echo issues

-You mean like when i implement analog cards and calling for my vicidial with asterisk right..?

-headset are the same, workstation are the same, Network layout and room layout still intact with the old setup.

No digium card or sangoma card are being used

-But what i recently tested is used PAP2 for calls using analog phone and call are really clear not echo at all. what might e the impact of it, might the PAP2 have echo canceler apps.

[williamconley]

or your present method is causing echo and that particular phone (i have no idea what a pap2 is) does not use the same method.

[ruben23]

@williamconley

This is PAP2 by linksys

http://www.voiptalk.org/products/Linksys+PAP2T

[williamconley]

if that device has no echo, but your agents using soft sip phone do have echo ...

consider that "to asterisk/vicidial" they appear the same. both are transmitted to the server as SIP.

since they are both considered the same by the server ... this would seem to indicate that the problem is agent-side.

are all your agents using the same brand of soft phone? headset? sound card? pc?

perhaps you should try zoiper, kiax, x-lite, twinkle, etc ... different headsets ... on some random agents and see if you can resolve the situation that way.

also, what codec are the agents using?

[ruben23]

Agents are using zoiper, twinkle and counterpath

Codec being used is G729 for local sofphones to asterisk and g729 again to my asterisk going to the carrier VOIP.

[Op3r]

lower the volume

[williamconley]

yep, lower the volume

and try one on ulaw and one on gsm

and one on kiax

and consider getting an actual sound card for one of the workstations

[boybawang]

I had a recent experience with echo and eyebeam, what I did was to reformat the workstation , reinstalled eyebeam and reconfigured it, the echo went away, bad or damaged headsets can also cause echo when in a call