Nortel NTRB21AA Meridian Rlse 12 TMDI 1.5M DTI/PRI Multipurpose Digital Input Phone Trunk Expansion Interface Module Card with Clock Controller Daughter Board NTAK2002 NTRB21AA 12.
Model Number: NTRB21AA
Part Number: NTRB21AA 12
Also Included:
1 x NTAK2002