This is a dual T-1 card that allows you to connect your MacroSMB to TWO T-1 lines employing RBS for up to 24 voice lines per T-1. No CSU/DSU is needed, this card connects to the smart jack at the dmark. This card must go in slot 8 or 10 of the MacroSMB, please confirm you have room for another card before buying! Also works with E-1 which provides up to 30 voice lines per E-1. |
