Make Rs-485 Bus Connections Between Shelves; Introduction; Prerequisite Procedures; Tools Required - ADTRAN MX2820 System Manual

Make RS-485 Bus Connections

INTRODUCTION

This procedure provides step-by-step instructions to make RS-485 bus connections between
MX2820 shelves.
Multiple shelves can be linked together for management from a single shelf that is designated
as the host shelf. The maximum number of shelves depends on the configuration. This feature
provides local or remote management for the shelves from the craft interface on the front
panel of the host System Controller Unit (SCU) or external management ports.
The daisy chain of shelves linked together via the RS-485 bus can be up to 4000 feet long.
Only one SCU, located at either end of the chain, is designated as the host SCU. The SCU that
is to function as the host must be provisioned as the host. The SCUs that are to function as
clients must be provisioned as clients. Procedures for designating the SCUs as host or clients
are provided in NTP-004.

PREREQUISITE PROCEDURES

Obtain all necessary local instructions before proceeding with the MX2820 shelf installation.
The MX2820 shelves should be mounted in their permanent location before making RS-485
bus connections.

TOOLS REQUIRED

• Wire strippers
• Wire-wrap tool
• Wire cutters

MATERIALS REQUIRED

• Shielded, twisted pair interconnect wire, with drain wire
61186003L1-1D
DLP-712
Between Shelves
7-73