VOLUME LOW with Zap lines

I have a A400P card with 4 FXO modules. All incoming calls are noticably quieter than internal calls or sip trunk calls. I added rxgain=7 to zapata.conf and that was better but now there is a noticeable background hum. Any suggestions?

Running PBXinaFlash 1.4 with zaptel

Thanks!

---Devin

hi:
please make sure the setting echocancel=yes, the value of rxgain donot set too high. Perhaps,you can refer to this:
http://wiki.openvox.cn/index.php/Troubleshooting_of_Analog_cards#Q12.2C_Sound_Quality_Problems_with_Analog_cards

My zapata.conf -


; Zapata telephony interface
;
; Configuration file

[trunkgroups]

[channels]

language=en
context=from-zaptel
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=no
echotraining=800
rxgain=6.0
txgain=0.0
group=0
callgroup=1
pickupgroup=1
immediate=no

;faxdetect=both
;faxdetect=incoming
;faxdetect=outgoing
faxdetect=no

;Include genzaptelconf configs
#include zapata-channels.conf



;Include AMP configs
#include zapata_additional.conf

---

Seems ok..

---Devin

Hi:
please post the IRQ information of your system with the command "cat /proc/interrupts".

hi:
one more, have you checked with the RJ11 connectors?