[Asterisk-Users] Does anyone have faxes working well with X100P and TDM40B cards?

[Jim Sneeringer]

Thanks so much.  This sounds encouraging.

I can't find a description of the "d" option. What does it do? Do I just put
a "d" in the extension? Right now I have this:

  exten => fax,1,Dial(Zap/8)

and I'm envisioning changing it to 

  exten => fax,1,Dial(Zap/8/d${EXTEN})

Is that right?

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Jonathan Biggs
Sent: Tuesday, March 16, 2004 6:55 PM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Does anyone have faxes working well with X100P
and TDM40B cards?

Have a HP Officejet combo working OK with inbound fax detection, receiving
faxes, and sending them using X100p and TDM400P, I just make sure I use the
"d" option on the dial string, for outbound and also inbound on the FAX
detection.
have the "d" option on the internal fax redirection, and have setup 8 as
outbound dialing for data calls (both modem and fax).

Did have problems when I had a mailbox configured on the line with the
modem, seems the VMWI logic set line in a weird state the modem could not
detect dial tone.

--- Jim Sneeringer <j at snee.us> wrote:
> When I send or receive faxes with a modem, the faxes are stretched and 
> have missing information.
> 
> Here are the things I have tried so far:
> 
>  - verified that the 2.4 GHz P4 is not overloaded
>  - tried different Asterisk channels for both FXO and FXS
>  - turned off echocancel
>  - bumped up rxgain and txgain
>  - tried different fax software (Windows vs. WinFax)
>  - confirmed that everything works fine when
>    the faxes are not routed through Asterisk.
> 
> One person told me I need ECM modems, but I don't have one to try and 
> I can't see asking my customers to get new modems.
> Also, what if the other end
> of the connection doesn't have ECM? I would really like to get 
> Asterisk to work with ordinary fax modems.
> 
> Why does Asterisk not work as well with fax modems as any other phone 
> system?
> 
> Thanks.
> 
> Jim