The wiki had this about UK POTS: In the UK, if you are using BT and are having problems with Asterisk not detecting hangups when using a TDM400P, contact BT and ask what the current "Disconnect Clear Time" setting is for your phone line. Mine was set to 100 and increasing it to 800 fixed the issue. "Disconnect Clear Time" (DCT) is BT's name for CPC. You will need to speak to the BT Faults service--they can check to see what your DCT/CPC is set to and reset it instantly to another value.
BT have two analogue line specifications: single line (BT SIN 351), and multiline (BT SIN 352), which explain the different forward disconnect parameters (http://www.sinet.bt.com/). These specifications state that for single line (like most of us have), the disconnect time is between 90ms and 130ms, for multiline it is 800ms. My impression is that the rest of the World (North America included) has a disconnect time in excess of 500ms, this explains why the default behaviour of zaptel (Digium and Sangoma cards alike) don't play well with single line BT phone lines for disconnect supervision. When ordering lines from BT - especially feature lines or business lines ask the sales person to set lines to PABX working. And if none of this works, it looks like the "maxsilence" parameter could end voice mail recording and allow you to terminate the call. --Don Don Kelly PCF Corp Real Support for your Virtual Office TM 651 842-1000 888 Don Kell(y) 651 842-1001 fax -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gordon Henderson Sent: Tuesday, September 16, 2008 3:08 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] UK call initiating party hangup control on analoghome lines On Tue, 16 Sep 2008, Roberts Klotins wrote: > Thanks Don, > > I have looked at that page and the described problem (when asterisk does > not detect remote (calling) party hangup) is exactly the opposite to my > case. In my case I learnt that for BT residential analog lines the > remote caller is entitled to hold the line open indefinitely, regardless > whether I hang up or not. So this seems to be a feature of BT rather > than a problem with asterisk. > > I do not know whether there are many countries where telco setup is > similar. That might be worth a posting to usenet:uk.telecom ... I've a funny feeling this is exchange dependant and it's not the same action for all exchanges. I can call my home BT line, answer it, then hangup and the call is cleared inside 10 minutes (usually 2-3) then I can make an outgoing call. I'm told that you need to tell BT that you have a PBX on the end of the line, but I've never done that for any analogue installation I've done. Gordon _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
