While I understand everything that you have said, I'm still a little confused. Yes - I have what looks like a centronics connector on the back. So, I can do "t100p with e&m signalling" <-> "act-1241 e&m card" <-> what? Namely, if the E&M card deals with the T1 end of the channel, how do I get that to a real phone? Will it "just work" if I plug an analog phone onto the correct pair coming out of the connector in the back? If not, what is the output of the E&M card? (and, more importantly, what would I need to do to hook it up to an analog phone?)
Thanks for clearing things up. --- Ilia Mirkin [EMAIL PROTECTED] On Sun, 2004-09-05 at 04:31, Steven Critchfield wrote: > On Sun, 2004-09-05 at 03:10, Ilia Mirkin wrote: > > hi, > > > > i have some newbie questions about channel banks. i have an adtran > > act-1241 sitting around. it accepts D4 modules, and it contains a number > > of e&m cards. > > > > first of all, how does this thing work? a t1 contains 24 channels, and i > > noticed that the channel bank has space for 24 cards. what do these > > cards do? what are their outputs? the ones that are in there have some > > outputs on the front marked "test", but nothing else. there are a number > > of wires coming out the back (48, if i had to guess), and it has a few > > ports on the front which seem to be able to take in a T1. am i correct > > in understanding that it is the card in the bank that determines the > > signalling style, and not the t1? as such, is there no way that i could > > use it in its current configuration to have it talk with analog phones > > (i.e. something like t100p -> act-1241 with e&m cards -> phone)? i'm a > > bit unclear on the different signalling types, and their > > intercompatibilities. > > > > if anyone could shed any light into this, i would very much appreciate > > it. > > Think of the T1 as 24 digital digital pathways. The coding of each > pathway must be compatible on each end. With E&M cards, you signal with > E&M and the line will work. The cards plug into a backplane where the > controller routes the digital signal to the card and then optionally > hook up the output from the card to a connector that consolidates many > lines. Look for something that looks like an older 50 pin scsi D > connector. > > If there is 2 RJ45 jacks on the front, and 2 50 pin D connectors on the > back, then it is likely that each card controlls 2 lines each. If there > is only 1 50 pin connector, then there is only 24 channels. > > Hope that helps. _______________________________________________ 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