[Asterisk-Users] BAD echo problems with Sangoma and Telstra

[Andrew Thrift]

Hello,

We have an Asterisk 1.0.9 machine with a Sangoma A101 card fitted, it is 
connected to a Telstra OnRamp E1 in Melbourne, Australia.  The problem 
we are experiencing is extreme echo and clicking noises. 

These are only audible to the calling party, e.g. the person calling in 
from the PSTN to Asterisk via the E1, the person on the SIP handset 
cannot hear any echo or clicking, only the PSTN side can.

As you can imagine, the calling party finds this quite annoying.

Has anyone else experienced this, or does anyone know how to fix this 
easily?

Regards,


Andy


Below are the configs:

##/etc/zaptel.conf

span=1,1,0,ccs,hdb3,crc4
bchan=1-15,17-31
dchan=16
loadzone=au
defaultzone=au
alaw=1-31
##EOF

##/etc/asterisk/zapata.conf

[channels]
context=melb_default_in
usecallingpres=yes
relaxdtmf=no
rxgain=0.0
txgain=0.0
busydetect=no
pridialplan=local
usecallerid=yes
callerid=asreceived
hidecallerid=no
callwaiting=no
callwaitingcallerid=no
threewaycalling=no
transfer=no
cancallforward=no
callreturn=no
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
adsi=no
callprogress=no


switchtype => euroisdn
signalling => pri_cpe
callgroup => 1
group => 1
immediate => no
channel => 1-10
##EOF

##/etc/wanpipe/wanpipe1.conf

[devices]
wanpipe1 = WAN_AFT, Comment

[interfaces]
w1g1 = wanpipe1, , TDM_VOICE, Comment

[wanpipe1]
CARD_TYPE       = AFT
S514CPU         = A
CommPort        = PRI
AUTO_PCISLOT    = NO
PCISLOT         = 0
PCIBUS          = 1
FE_MEDIA        = E1
FE_LCODE        = HDB3
FE_FRAME        = CRC4
FE_LINE         = 1
TE_CLOCK        = NORMAL
TE_REF_CLOCK    = 0
ACTIVE_CH       = ALL
TE_HIGHIMPEDANCE        = NO
FE_TXTRISTATE   = NO
MTU             = 1500
UDPPORT         = 9000
TTL             = 255
IGNORE_FRONT_END = NO
TDMV_SPAN       = 1
TDMV_DCHAN      = 0

[w1g1]
ACTIVE_CH       = ALL
TDMV_ECHO_OFF   = YES

##EOF