Googling "telco disconnect supervision," I found the following description: http://mirror.lcs.mit.edu/telecom-archives/telecom-archives/TELECOM_Digest_Online/1559.html
[cut] Re: How Do I Get "Kewlstart" From my Phone Company? Paul A Lee Tue, 24 Aug 2004 16:58:16 -0400 ... It appears that "kewlstart" is just a coined name for loop signaling with disconnect supervision. Disconnect supervision is also called "calling party control", "forward disconnect", "open loop disconnect", "open switch interval", "adjunct control", and perhaps other names. What is supposed to happen is that the CO switch (or other switch serving as the office end) will remove battery voltage from the loop for about 250 ms within 6 seconds after the far-end party disconnects.
As far as I can tell, most CO switches now seem to provide disconnect supervision by default on loop-start lines. Consequently, it can be difficult to find someone at telco who knows anything about it. ... As for availability on residential service, just check your current loop-start line(s) with a voltmeter and see if it drops toward zero for about 250 ms when the far end disconnects from the call. If there's no disconnect supervision, you'll see the voltage stay at about 7-8 VDC when off-hook, and about 48 VDC on-hook. [/cut]
I can hear what sounds like a battery drop on my lines when the far-end disconnects but asterisk doesn't seem to detect it.
Anyone have ideas. Or experience with this?
Regards
Glen Johnson
_______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
