Nortel 4x0 Caller ID LS/DS Trunk Cartridge NT5B41GA

The Nortel Norstar 4x0 Caller ID LS/DS Trunk Cartridge NT5B41GA provides the same functions as the LS/DS trunk cartridge, but it can also display caller ID information on Norstar telephones. The Nortel Norstar 4x0 Caller ID Trunk Cartridge adds 4 CO analog lines to a Modular ICS or a Compact ICS telephone system. Up to 3 4x0 Caller ID Trunk Cartridges can be added to a Norstar 12 x 0 Station Module. Comes with a full one year warranty.