TruePulse is looking to purchase NT2X05AB and NT2X45CA circuit packs for the Nortel DMS-100 switch.

The NT2X05AB, HECI code ENPQSDL or ENPQN9C, is a DMS-100 LM Converter +24V circuit pack.  You may also be familiar with it as a Genband NT2X05AB.

The NT2X05AB line module converter +24V card provides a regulated 24 V DC power supply. The card operates as a ringing generator in line modules (LM) and remote line modules (RLM) in DMS-100 equipment. The NT2X27 ringing generator interface card controls the NT2X05AB for this function. The card provides a voltage source that you can program. The voltage source supplies ac or dc outputs over a wide range of frequencies and voltages.

The NT2X45CA, HECI code ENPQAKS, is a DMS-100 Trunk Module (TM) Interface card.  You may also be familiar with it as a Genband NT2X45CA.

The NT2X45CA TM interface card serves as the network interface for the network planes. The card provides two 2-way interfaces for the two transmission paths from the network planes. The card contains message registers, bit and channel timing circuits, circuits that check parity, and circuits that format data again.

Genband, now Ribbon Communications, no longer supports the DMS-100.

In addition to the NT2X05AB and NT2X45CA, we are interested in other Nortel DMS-100 circuit packs.  Furthermore, we are looking for circuit packs for other voice switches, such as the Lucent 5ESS, Nortel MSL-100, and the GTE GTD-5.

Updated October 20, 2021