Where is echo?

General Help
1

FXS VoIP Gatevay Dlink DVG-2032S
Desktop server Asterisk 11.2.1

  • Quasar E1 PCI card

Callers and users hears echo. Where i need to setup echo cancelation in this scheme?

Every device use own echo cancellation. Maybe they are bad for each other?

http://parabel.ru/i/products/quasar/quasar_pabx.png

2

===etc/dahdi/system.conf===
span=1,1,0,CCS,HDB3,CRC4
span=2,0,0,CCS,HDB3,CRC4
bchan=1-15,17-31,32-46,48-62
dchan=16,47
loadzone=us
defaultzone=us

===/etc/asterisk/chan_dahdi.conf===
[channels]
…
echocancel=yes
echocancelwhenbridged=no
echotraining=no
…

3

Gateway’s EC and Dahdi’s EC should not interfere with each other. You probably need to see if there are some parameters for the echo canceller in the gateway device, besides just turning it off and on.

Also, what are the endpoints?

Does it happen for the E1/T1 calls?

4

Endpoint is simple analog phones. Yes, E1 calls have echo too.

Ok, thansk, i turned off echo cancelatioin on gateway, today will see how it works.

5

Your /etc/dahdi/system.conf does not define a software echocanceller, they are disabled by default, if you have a hardware echocanceller, it will be on by default, either way, dahdi_cfg -vv will identify any dahdi echocancellers you have active, you probably don’t want to have two echo cancel processes running at the same time, they will almost certainly fight each other.