I’m wanting to set up a system in parallel with an existing system, that will passively monitor the channels on a PRI/T1. This would need to be competely unintrusive on the T1. Is this something that would be possible to do using asterisk, or the card driver layer beneath it? (perhaps by lifting the TXD pair on the cable and using asterisk in some “passive” mode?)
Sangoma has a kit (http://www.sangoma.com/products_and_solutions/hardware/line_tapping.html)
that does monitoring in this manner, I’m hoping there’s a way to do it using the card and software I already have on hand.
Any information or advice would be greatly appreciated.