I am lost among all sorts of port.
controller T1 0/0, I guess it refers to HW piece.
interface Serial0/0:23, This is logic port? what 0/0:23 stand for?
voice-port 0/0:23, what is that 0/0:23 again? underneath it is 23 ISDN-voice channels. Cisco refer a port as a T1 trunk?
and then,I have this again in ALL pots diap-peer:
dial-peer voice xx pots