asterisk users - Sep 2005 - BAD echo problems with Sangoma and Telstra

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

On 9/27/05, Andrew Thrift <andrew@thrift.kicks-ass.net> wrote:
> [w1g1]
> ACTIVE_CH = ALL
> TDMV_ECHO_OFF = YES

Have you tried not enabling the "TDMV_ECHO_OFF = YES" since this
overrides
the zapata.conf echocancel=yes setting?

MATT---
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Hi Matt,

I was actually thinking that might be the cause, I have changed it now 
but will not be able to test untill tomorrow as the box is in production.

Thanks!!!


Matt Florell wrote:
> On 9/27/05, *Andrew Thrift* <andrew@thrift.kicks-ass.net 
> <mailto:andrew@thrift.kicks-ass.net>> wrote:
>
>     [w1g1]
>     ACTIVE_CH       = ALL
>     TDMV_ECHO_OFF   = YES
>
>
> Have you tried not enabling the "TDMV_ECHO_OFF   = YES" since
this
> overrides the zapata.conf echocancel=yes setting?
>
> MATT---
>
>
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On Wed, Sep 28, 2005 at 12:09:46PM +1200, Andrew Thrift arranged a set of bits
into the following:
> 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.
Hmm, have a few BRI's but no E1's on asterisk (just on an old samsung)
but we've never had echo troubles, even without an echo can. (Yes in
melbourne, both CBD and surrounds)

The clicking sounds like a clock issue, or not enough cpu. What are your
phones, maybe it's acoustic echo.

Are you seeing any odd log messages (with debug=10 and verbose=10)?
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> > -----Original Message-----
> > From: Julien Goodwin [mailto:asterisk-lists@studio442.com.au]
> > Sent: Wednesday, September 28, 2005 6:28 AM
> > To: asterisk-users@lists.digium.com
> > Subject: Re: [Asterisk-Users] BAD echo problems with Sangoma and 
> > Telstra
> > 
> > On Wed, Sep 28, 2005 at 12:09:46PM +1200, Andrew Thrift 
> arranged a set 
> > of bits into the following:
> > > 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.
> > Hmm, have a few BRI's but no E1's on asterisk (just on an old
> > samsung) but we've never had echo troubles, even without an 
> echo can. 
> > (Yes in melbourne, both CBD and surrounds)
> > 
> > The clicking sounds like a clock issue, or not enough cpu. 
> > What are your phones, maybe it's acoustic echo.
> > 
> > Are you seeing any odd log messages (with debug=10 and verbose=10)?
> > 
 
Try listening to some of the sample mp3's at this link and 
see if one of them matches what your hearing.  If you get a 
match then the explanations should point you in the right direction.
http://www.voiptroubleshooter.com/diagnosis/usersymptoms.html