I don't think you want a latching relay, unless you know how to build the support circuit -- a latching relay has two coils and requires a short pulse of power on either coil to change state. The advantage is that it doesn't need any power to hold state, but of course the circuit isn't straightforward anymore.
I used: http://www.allelectronics.com/cgi-bin/category.cgi?category=search&item= RLY-625&type=store On mine and hooked it up to an internal 5V supply of the * box. When the box is off, one of my cordless phones gets the line for 911; when the box is on, the cordless is an extension on *, and the PSTN line goes into an X100P. > -----Original Message----- > From: Rajeev Sharma [mailto:[EMAIL PROTECTED] > Sent: Sunday, October 10, 2004 9:21 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [Asterisk-Users] Vonage, PSTN, 911, and hardware question > > > OK, first of all, thanks for all the great help everybody. > It's nice to see that * has such a nice > community! > > Anyway, that double-pole-double-throw relay looks like just > the right thing. If I'm understanding > right, the relay design that Henry Devito sent me is the > exact same thing as the Viking PF-6A. So, > has anyone had experience with these things? Are they easy to > build? (This is a home project, so > things don't have to be professional.) Any tips? Right now > I'm thinking of trying to build something > out of this $1.25 12VDC relay (I believe Henry said it had to > be 12V): > http://www.allelectronics.com/cgi-bin/category.cgi?category=50 > 0&item=RLY-87&type=store _______________________________________________ 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
