[Asterisk-Users] How to ensure that software echo cancellation ison?

[Anton Krall]

Hehehe then something is weird with mine :=

I have this

Zapata.conf


echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
echotraining=800

And now:

voip*CLI> zap show channel 1
Channel: 1
File Descriptor: 18
Span: 1
Extension:
Dialing: no
Context: casa
Caller ID:
Calling TON: 0
Caller ID name:
Destroy: 0
InAlarm: 0
Signalling Type: FXS Kewlstart
Radio: 0
Owner: <None>
Real: <None>
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 128 taps, currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Hookstate (FXS only): Offhook

Mine says its off too..... Anything wrong?
Also, says fax handled no.. What does that mean? Has anything to do with:

faxdetect=both
faxdetect=incoming
faxdetect=outgoing
faxdetect=yes

?????? 

|-----Original Message-----
|From: asterisk-users-bounces at lists.digium.com 
|[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
|jjones at quiddesign.com
|Sent: Jueves, 02 de Junio de 2005 05:00 p.m.
|To: Asterisk Users Mailing List - Non-Commercial Discussion
|Subject: Re: [Asterisk-Users] How to ensure that software echo 
|cancellation ison?
|
|Per your readout it is off. A normally operating channel would 
|look something like
|
|Echo Cancellation: 128 taps, currently ON
|
|
|You are restarting asterisk as you make changes and not just 
|reloading right:)
|
|On Jun 2, 2005, at 3:40 PM, Don Murray wrote:
|
|>
|> I have appended my /etc/asterisk/zapata.conf and my /etc/ 
|zaptel.conf 
|> files.  I am running Asterisk 1.0.7 on a P3 800 MHz system in an 
|> office with around 20 sip phones.  We are using a Digium Wildcard 
|> TE110P that is connected to a T1 line with 8 lines enabled. We have 
|> been experiencing irritating echo on the sip phone side when local 
|> lines are called.
|> After reading a lot of echo related threads, I think I 
|understand the 
|> 4-wire to 2-wire cause of this echo.  I have noticed that 
|when calling 
|> long distance and with some cell phones there is no echo, which is 
|> consistent with a system that has echo cancellation on the 
|destination 
|> end.
|>
|> So, I've been trying to enable software echo cancellation to 
|see if it 
|> will improve the situation.  If you look down to see my zapata.conf 
|> file, you will see I've tried to set echocancel and 
|> echocancelwhenbridged, and that I've also mucked around with 
|> echotraining.  None of these appear to be doing anything.
|> However, I *think* this is because they are not being enabled 
|> properly, because when I try to see the details of an active zap 
|> channel (see zap show channel command) it says "Echo Cancellation:
|> 0 taps unless TDM bridged, currently OFF".   I'm not sure if I'm  
|> doing this debugging right, so I wanted to ask people both :
|>
|> (a) am I enabling echocancel correctly?  I've heard that sometimes 
|> these parameters can behave differently depending on the order they 
|> appear in the file??
|>
|> (b) am I doing the right thing to detect if echo 
|cancellation is on?  
|> Whats the righ tway to do that?
|>
|> btw, I have rebuild my zaptel src with "AGGRESSIVE" cancellation 
|> enabled, with MMX enabled and with MARK2 cancellation enabled.
|>
|> Any advice appreciated!
|>
|> Thanks,
|> Don
|>
|>
|>
|> asterisk1*CLI> zap show channel 8-1
|> Channel: 8CLI>
|> File Descriptor: 32
|> Span: 1
|> Extension:
|> Dialing: no
|> Context: from-pstn
|> Caller ID string: 520xxxxxxx
|> Destroy: 0
|> InAlarm: 0
|> Signalling Type: PRI Signalling
|> Owner: <None>
|> Real: <None>
|> Callwait: <None>
|> Threeway: <None>
|> Confno: -1
|> Propagated Conference: -1
|> Real in conference: 0
|> DSP: no
|> Relax DTMF: no
|> Dialing/CallwaitCAS: 0/0
|> Default law: ulaw
|> Fax Handled: no
|> Pulse phone: no
|> Echo Cancellation: 0 taps unless TDM bridged, currently OFF 
|PRI Flags:
|> PRI Logical Span: Implicit
|> Actual Hookstate: Onhook
|> asterisk1*CLI>
|>
|>
|> === zapata.conf
|>
|> [channels]
|> language=en
|>
|> context=from-pstn
|> switchtype = national
|> signalling = pri_cpe
|> group = 0
|> channel => 1-8
|> faxdetect=both
|> ;;echocancel=yes
|> ;;echotraining=yes
|> ;echocancelwhenbridged=yes
|> echocancel=256
|> ;echotraining=800
|>
|>
|> === zaptel.conf
|>
|> loadzone        = us
|> defaultzone     = us
|>
|> span=1,1,0,esf,b8zs
|> bchan=1-8
|> dchan=24
|>
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