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

Страница: 214 / 220

CRS-500 1:N Redundancy System
Revision 4
Appendix C C–2 MN-CRS-500
C.2.1.1 Modem and Transceiver Addresses
To monitor and control modems and transceivers at the distant-end of the communication link,
EDMAC must be enabled, via the modem front panel, in local mode. Set the Tx and Rx
parameters to establish the link on the modems on each end of the link. Then, an M&C
application can be used.
Examples of EIA-232 and EIA-485 addressing schemes are shown in the diagrams that follow.
Included in these diagrams is the following terminology:
•
MCA (Monitor & Control Address) – This address is to be entered as the address of a
unit into an M&C application, e.g., SatMac. Modem addresses are automatically
assigned by the TMI/RMI slot positions to which they are associated within a Switch.
When using EIA-485 multi-drop, the Switch bus address be changed on the Switch by the
User to 1000, 3000, 5000, 7000, or 9000 (7000 is shown in the figures in this appendix as
an example only).
•
RCA (Remote Control Address) – This address is to be configured, via the unit front
panel (CONFIG:REMOTE).
•
ESA (EDMAC Slave Address (Range)) – Configure the local modem as the EDMAC
Master ; the Distant-end modem is an EDMAC Slave.
The CDM-625/A modems utilize a point-to-point internal serial communication bus to the Switch
within the DB-25 or DB-9 cable.
Figure C-1 illustrates an external EIA-232 addressing scheme
for these modems; Figure C-2 depicts an external EIA-485 connection.