<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2657.73">
<TITLE>RE: [Asterisk-Users] SoftFAX/spandsp - release 0.0.1i - txfax findings</TITLE>
</HEAD>
<BODY>
<P><FONT SIZE=2>Hi,</FONT>
</P>
<P><FONT SIZE=2>We have no problems sending to HP and Panasonic fax machines in the office.</FONT>
<BR><FONT SIZE=2>We do have problems when we try to send faxes to services supporting</FONT>
<BR><FONT SIZE=2>fax, i.e. J2 or our UC platform. The receiving side doesn't recognize fax.</FONT>
</P>
<P><FONT SIZE=2>To send a fax we drop into /var/spool/asterisk/outgoing:</FONT>
<BR><FONT SIZE=2>Channel: Zap/g1/<fax number></FONT>
<BR><FONT SIZE=2>MaxRetries: 0</FONT>
<BR><FONT SIZE=2>WaitTime: 20</FONT>
<BR><FONT SIZE=2>Context: webley_txfax</FONT>
<BR><FONT SIZE=2>Extension: txfax_ext</FONT>
<BR><FONT SIZE=2>Priority: 1</FONT>
<BR><FONT SIZE=2>SetVar: TXFAX_NAME=<fax name></FONT>
</P>
<P><FONT SIZE=2>and extensions.conf contains:</FONT>
<BR><FONT SIZE=2>[webley_txfax]</FONT>
<BR><FONT SIZE=2>exten => txfax_ext,1,txfax(${TXFAX_NAME}|caller)</FONT>
<BR><FONT SIZE=2>exten => txfax_ext,2,Hangup</FONT>
</P>
<P><FONT SIZE=2>Two questions:</FONT>
<BR><FONT SIZE=2>1. Sounds like txfax sends just one CNG tone. Can we have a parameter making</FONT>
<BR> <FONT SIZE=2>txfax issue periodic CNGs until it gets CED back? This might resolve the</FONT>
<BR> <FONT SIZE=2>problem with the receiver missing the first (and only) tone and therefore</FONT>
<BR> <FONT SIZE=2>working as if this is not a fax?</FONT>
<BR><FONT SIZE=2>2. For Zap channels - don't we need to take care of 'dataquality', 'ignoredtmf'</FONT>
<BR> <FONT SIZE=2>and/or 'faxhandled'? In several cases J2 would send CED, so asterisk</FONT>
<BR> <FONT SIZE=2>switched to a fax extension creating a complete mess.</FONT>
</P>
<P><FONT SIZE=2>Thank you.</FONT>
</P>
<P><FONT SIZE=2>Alex Zarubin</FONT>
<BR><FONT SIZE=2>Webley Systems</FONT>
</P>
</BODY>
</HTML>