Product manual

Installation instructions, Line Termination Unit (LTU2) – REX-BRD0019 (ROFNB 157 25/2)

Technical Product Manual - DCT1800-GAP

TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C

Chapter 15 Line Termination Unit (LTU2) – REX-BRD0019

(ROFNB 157 25/2)

15.1 General

This version of the LTU does not support cascaded telephone connections.

Note:

ROFNB 157 25/1 and REX-BRD0019 (ROFNB 157 25/2) can not be used together in one system.

Maintenance

The LTU contains the following field-exchangeable parts (see figure):

•LTU firmware

15.2 Board description

Jumpers

Not applicable.

Connectors

The LTU has 3 connectors at the front by which Line Termination Circuits (LTCs), are connected to

the PBX.

• LTC1 - LTC4: connection of PBX line 1 to 4.

• LTU Ground: connection of signalling earth (ELR).

• LTC5 - LTC8: connection of PBX line 5 to 8.

LEDs

LED1 : Normally on. Power on

LED2 : Normally off. Watch-dog (not significant)

LED3 : Normally off. Board not polled

LED4 : Normally off. Board error

15.3 Installation

1. Insert the LTU gently into the slides of its specified board position

2. Gently push the board into the back connector till it locks. Do not use any force.

Note: