> Hi, I have had this issues for ages but have ignored it, but my handsets get > faint background crackle on the FXS port. When I connect the > handset directly into my PSTN, it goes away complete, so I am generating this > from somewhere in my asterisk box. I get it immediately when the > phone goes off-hook and it stays through the dialing and call progress. > > I can't think of any other devices generating any interference along the line > anywhere between the FXS port and my phone handset. > > Any ideas ?
Some things to check........ - put a voltmeter across tip-ring on the phone connected to the TDM card to see if the 48 volt DC is varies. - ensure the 12 volt connector for the card is solidly connected - check for shared interrupts (TDM card should be on an interrupt by itself; hundreds of postings in the archives on how to check, etc. - call digium support _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
