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Hi, I am running into a issue with a TDM04B card. When dialing
out I get an noticeable (extreme to some people) echo, in that I can hear
myself. The person on the other line doesn’t hear any echo and the call
sounds perfect to them. I checked and tested a few things as per suggestions on
voip-info.org with RX/TX gain and using ztmonitor. I adjusted the rxgain=10.5 txgain=-4.5 and it doesn’t seem to
do to much to eliminate me hearing myself on the phone. I can’t go any
lower on txgain then -5.5 before the call doesn’t go through any more. If
I change the txgain to above 0 the echo gets even worse. I am using Cisco 7960 phones and calling IP to IP is
perfect; the echo occurs only when going out the zap channels to the PSTN.
Below is the relevant zapata.conf file. I also checked the /proc/interrupts
file and the interrupts seem normal (see below). If anyone has any other suggestion, please let me know, Thanks Sascha ### /proc/interrupts ############ CPU0
CPU1 0: 62224232 62229547
IO-APIC-edge timer 1: 0
3
IO-APIC-edge
keyboard 2: 0 0
XT-PIC
cascade 4: 0
5
IO-APIC-edge
serial 8: 0
1
IO-APIC-edge
rtc 14: 0
2
IO-APIC-edge
ide0 18: 556800 715820
IO-APIC-level libata 20: 562694111 681819012
IO-APIC-level wctdm 53: 24008833 8
IO-APIC-level
eth0 NMI: 0
0 LOC: 123628432 123628430 ERR: 0 MIS: 0 ##### /etc/asterisk/zapata.conf ######### ; ; Zapata telephony interface ; ; Configuration file [trunkgroups] [channels] language=en context=from-pstn signalling=fxs_ks rxwink=300
; Atlas seems to use long (250ms) winks ; ; Whether or not to do distinctive ring detection on FXO lines ; ;usedistinctiveringdetection=yes usecallerid=yes hidecallerid=no callwaiting=yes usecallingpres=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=yes ;echotraining=800 echotraining=yes rxgain=0.0 txgain=0.0 group=0 callgroup=1 pickupgroup=1 immediate=no ;faxdetect=both faxdetect=incoming ;faxdetect=outgoing ;faxdetect=no ;Include genzaptelconf configs #include zapata-auto.conf ;Include AMP configs #include zapata_additional.conf |
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