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. -- Steven Critchfield <[EMAIL PROTECTED]> _______________________________________________ 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
