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<P><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif">From: <I>Jorge Mendoza <mendoza@tcc.com.pe></I><BR>>Funny that a digital line have a analogue pulse.<BR>>Normally the billing pulse is used on payphones. IMO you only need <BR>>the answer supervision to trigger your own billing system.<BR>><BR>>Jorge Mendoza<BR>><BR>>Stefano Corsi wrote:<BR>>>Hello,<BR>>><BR>>>I've discovered that in Italy ISDN lines can be programmed to <BR>>>generate a "billing pulse" every n seconds (it dipends from the <BR>>>pricebook). The pulse has these figures:<BR></FONT></P>
<P><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif">Whatever reason, if telco provides them, there's a good chance that some ISDN interface cards can use them. (Just googled to confirm that some non-Digium cards can be used in Asterisk.) This doesn't mean that Asterisk can use them. So you may need significant programming to get going.</FONT></P>
<P><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif">If they are truly analogue pulses, it could be cheaper to produce a little dedicated circuit to feed an AGI or something.</FONT></P><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif"></FONT></DIV>
<DIV class=RTE><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif">Yuan Liu</FONT></DIV>
<DIV class=RTE><FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif"><BR>>>frequency <BR>>>.................................................................... <BR>>>12 kHz ?1%<BR>>><BR>>>level <BR>>>.......................................................................... <BR>>>200 mVrms on 200<BR>>><BR>>>distortion................................................................... <BR>>>< 5%<BR>>>pulse duration <BR>>>.............................................................125 ?<BR>>>25 ms<BR>>>pause duration <BR>>>................................................................> <BR>>>180 ms<BR>>>period <BR>>>.......................................................................> <BR>>>300 ms<BR>>><BR>>>Does someone know if these values
can be used somehow to get an <BR>>>accurate billing using asterisk with these lines? Could be a matter <BR>>>of configuration or programming?<BR>>><BR>>>Thanks<BR>>>Stefano<BR></DIV></FONT></div></html>