Comtech EF Data CRS-500, Инструкция по установке и эксплуатации

Страница: 213 / 220

CRS-500 1:N Redundancy System
Revision 4
Appendix C C–1 MN-CRS-500
Appendix C. ADDRESSING
SCHEME INFORMATION
C.1 Addressing Overview
A CRS-500 1:N Redundancy System provides 1:N redundant operations – that is, it is capable of
controlling up to 10 Traffic modems and one Redundant Modem in up to a 1:10 configuration.
The user can remotely communicate to the Switch or any of the modems via the DB-9, EIA-232,
or EIA-485 Remote connector on the CRS-530 Switch Controller card (installed in rear panel of
the CRS-500 Control Switch Unit – CSU). A direct User-to-modem connection is not permissible
in this configuration – master operation is restricted to the Switch in a redundancy system.
For Switch to modem communications with the CDM-625/A modems, the Switch uses serial
communications via a DB-25 data cable or an HD-15 Control Cable that is connected between
each modem and the Switch-installed TMIs.
For the modems that are configured for EDMAC framing, Monitor & Control (M&C) information
may be communicated to the modems and transceivers at the distant-end of the link. In order for
an M&C application to be able to communicate with the various devices connected to the Switch,
the correct addresses must be used.
This appendix provides details of the address requirements to allow M&C of the Switch, various
modems, and transceivers that may be included in a CRS-500 1:N Redundancy System.
C.2 Switch Addresses
The permitted Switch remote control addresses are limited:
•
For EIA-232 , the only permitted address is 0000.
•
For EIA-485 connections, the only permitted addresses are 1000, 3000, 5000, and 7000.
1. The Switch settings for external communications are totally independent
from the internal communication between Switch and Traffic Modems.
2. 2:N Redundancy is a future offering. At present, the CRS-500 operates only
as a 1:N redundant switching product. Therefore, only RM 1 (Redundant
Modem 1) is functional.