echo on TE122

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Asterisk Users 3 Comments

I have setup a asterisk with freepbx, a TE122 and i have an ISDN.
My problem now is that callers are experiencing echo. checked on dmesg i
saw this:

# dmesg -c
dahdi: Disabled echo canceller NLP because of CED rx detected on channel 2

i searched google but found no soolution and i have no idea what that
error means.
below are other details that might be of value.

# dahdi_hardware
pci:0000:04:00.0 wcte12xp+ d161:8001 Wildcard TE122

# dahdi_scan
[1]
active=yes
alarms=OK
description=Wildcard TE122 Card 0
name=WCT1/0
manufacturer=Digium
devicetype=Wildcard TE122
location=PCI Bus 04 Slot 01
basechan=1
totchans=31
irq=20
type=digital-E1
syncsrc=1
lbo=0 db (CSU)/0-133 feet (DSX-1)
coding_opts=AMI,HDB3
framing_opts=CCS,CRC4
coding=HDB3
framing=CCS

chan_dahdi.conf contains:
echocancel=yes
echocancelwhenbridged=yes
echotraining=800

3 thoughts on - echo on TE122

  • That’s saying that the echo canceller activated for channel 2 is
    disabled because it believes that the far side is a fax machine or modem.

    If you’re not actively trying to run faxes through your system, you
    could try enabling CONFIG_DAHDI_NO_ECHOCAN_DISABLE in
    include/dahdi/dahdi_config.h.

    Cheers,
    Shaun

  • If all the echo problems are due to erroneous tones, then I believe it
    should.

    If your users are still reporting echo you might want to contact Digium
    technical support for help with troubleshooting.

    Cheers,
    Shaun