[Asterisk-Users] fax receive using TDM400P

[Anton Krall]

Steve

I have tried using r2mfc with E1 and also using TDM over analog. I don’t use
hardward echo cancel and my settings on zapata are:

[channels]
language=sp
signalling=fxs_ks
usecallerid=yes
cidsignalling=bell
cidstart=ring
hidecallerid=no
callwaiting=yes
usecallingpres=yes
;sendcalleridafter=1
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=no

rxgain=3
txgain=-3
echocancel=32
echocancelwhenbridged=yes
echotraining=yes

;relaxdtmf=yes
group=1
callgroup=1
pickupgroup=1
immediate=no
callerid=asreceived
amaflags=default
;accountcode=lss0101
busydetect=yes
busycount=4
faxdetect=both
faxdetect=incoming
faxdetect=outgoing
faxdetect=yes
musiconhold=default
context=zapincoming
channel => 32-37

echocancel=no
echocancelwhenbridged=no
echotraining=no
context=38
rxgain=7
txgain=-3
channel => 38

echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
echotraining=800
rxgain=3
txgain=0
context=telularincoming
group=2
channel => 39

Take a look at 38, that’s the fax incoming channel. Does anything looks
weird?

Anything else that might be broken in my setup? R2mfc works perfectly (some
problems here and there but so far, call go thru) 

|-----Original Message-----
|From: asterisk-users-bounces at lists.digium.com 
|[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
|Steve Underwood
|Sent: Saturday, February 25, 2006 8:17 AM
|To: Asterisk Users Mailing List - Non-Commercial Discussion
|Subject: Re: [Asterisk-Users] fax receive using TDM400P
|
|If you need to play with gains to make rxfax work something is 
|broken in your setup. It could be your echo canceller is not 
|turning off as the fax begins. fax modems normally work just 
|fine over a wide range of signal levels.
|
|Steve
|
|
|Anton Krall wrote:
|
|>Also one question. Do you still have to play with gains when using 
|>iaxmodem as you need to when using rxfax?
|>
|>|-----Original Message-----
|>|From: asterisk-users-bounces at lists.digium.com
|>|[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
|>|Administrator TOOTAI
|>|Sent: Saturday, February 25, 2006 7:07 AM
|>|To: Asterisk Users Mailing List - Non-Commercial Discussion
|>|Subject: Re: [Asterisk-Users] fax receive using TDM400P
|>|
|>|Anton Krall a écrit :
|>|
|>|>Why is iaxmodem with hylafax more stable than spandsp?
|>|>
|>|>Can you run iaxmodem and hylafax together with spandsp (for
|>|running E1
|>|>r2mfc)?
|>|>  
|>|>
|>|You're mixing thinks: iaxmodem+hylafax is equivalent to 
|rx_fax/tx_fax, 
|>|both are based on spandsp which is the library.
|>|
|>|>|-----Original Message-----
|>|>|From: asterisk-users-bounces at lists.digium.com
|>|>|[mailto:asterisk-users-bounces at lists.digium.com] On Behalf
|>|Of Rob Danz
|>|>|Sent: Friday, February 24, 2006 9:34 AM
|>|>|To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
|>|>|Subject: RE: [Asterisk-Users] fax receive using TDM400P
|>|>|
|>|>|I wrestled with this for a long time, as have many others
|>|and it just
|>|>|doesn't work with spandsp and asterisk alone.
|>|>|
|>|>|Use iaxmodem and hylafax in conjunction with asterisk... it
|>|works like
|>|>|a champ.  I have a single POTS line coming in so I get voice & fax 
|>|>|with a single number using fax detect.
|>|>|
|>|>|http://iaxmodem.sourceforge.net/
|>|>|
|>|>|
|>|>|
|>|>|-----Original Message-----
|>|>|From: Rich Adamson [mailto:radamson at routers.com]
|>|>|Sent: Friday, February 24, 2006 7:28 AM
|>|>|To: Asterisk Users Mailing List - Non-Commercial Discussion
|>|>|Subject: Re: [Asterisk-Users] fax receive using TDM400P
|>|>|
|>|>|> Ive been testing how to receive faxes using TDM400P cards and so 
|>|>|> far,
|>|>|after
|>|>|> playing with gains, echocancell and echotraining on
|>|>|zapata.conf.. Ive
|>|>|> ha
|>|>|dno
|>|>|> luck, faxes come in as garbage or broken or with blank lines.
|>|>|> 
|>|>|> Anybody has successfully done this? Any tips.. Also I have
|>|>|some ideas:
|>|>|> 
|>|>|> 1. Is it really possible to get fxes on a fax machine using
|>|>|ATAs like
|>|>|> the sipura 2002? Even using ulaw and pass-thru, is it possible?
|>|>|> 
|>|>|> 2. Since the faxes is coming from PSTN thru the card, I
|>|>|guess asterisk
|>|>|will
|>|>|> always stay in the middle right? No way around this.
|>|>|> 
|>|>|> 3. Im also trying to receive faxes usign a TE110P card
|>|with spandsp,
|>|>|unicall
|>|>|> and E1 R2MFC, no luck also, some stuff, garbage and 
|broken faxes. 
|>|>|> Anybody done this sucessfuly?
|>|>|> 
|>|>|> Hope anybody can share their thoughts and insight on this.
|>|>|
|>|>|Using the TDM400 card for any form of fax'ing (or modem 
|use) is well 
|>|>|known to be unreliable and, in most cases, totally unusable.
|>|The issue
|>|>|has been discussed many times over the last two years or so. 
|>|There are
|>|>|no known workarounds.
|>|>|
|>|>|Its my understanding that lots of folks have spandsp 
|working via T1 
|>|>|and/or PRI interfaces. The issues associated with the 
|TDM400 card do 
|>|>|not apply to the T1 cards.
|>|>|
|>|>|
|>
|
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