NEC 3 Analog Trunks daughter board (mount to 008U/000U card) - IP7WW-3COIDB-C1 Mfr. Part #: BE116510 Provides interface for (3) standard loop-start CO trunks Equipped with (1) 8-conductor interface jack Must be installed on 082U, 008U, or 000U Cards Max (1) daughter board per 082U, 008U, or 000U Max of (4) can be installed in each Chassis (Main & Exp) Max of (12) can be installed per system *There is no Power Failure Transfer circuitry