On Aug 19, 2008, at 1:44 AM, [EMAIL PROTECTED] wrote: > i read a few articles online about the possibility to setup a > "buzzer" door system to PBX using asterisk!
I took a somewhat unique approach, based on reading recent postings. We already had intercoms without door relays. So, I bought a Grandstream GXW-4008 (8-port FXS) which supports loop current disconnect (often called CPC). My intercoms need this, and I found out that our Linksys PAP2Ts cannot do this. (Only for incoming calls, which is rather useless here.) To open the relay, I bough a USB-IIRO-8 from ACCES I/O Products. It provides me with 8 relay closures (and 8 inputs, which I'm not currently using.) I wrote a very simple C app to close a relay based on command line parameters (relay number and duration.) I have an extension in Asterisk use the System dialplan command to open the door with our existing door latches through our HAI control system (which provides the delay to keep it open for 6 seconds or until it opens.) It's extremely fast and reliable. I run the phone and relay through the same Cat 6 cable. We are only using 3 doors for now, but I can go up to 8, of course, with this setup. Norman Franke Answering Service for Directors, Inc. www.myasd.com _______________________________________________ -- 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
