Comtech EF Data CRS-300 - Manual (Page 286)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix C Revision 19
C–2
C.1.1 Switch Addresses
The permitted Switch remote control addresses are limited:
• For EIA-485 connections, the only permitted addresses are 1000, 3000, 5000, and 7000.
• For EIA-232, the only permitted address is 0000.
The Switch settings for external communications are totally independent from the
internal communication between Switch and traffic modems
C.1.2 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 illustrated in
the diagrams that follow.
These diagrams include the following terminology:
Abbreviation Explanation
MCA Monitor & Control Address, 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, you may change the Switch bus address to 1000, 3000, 5000,
7000, or 9000 (7000 is shown in the figures in this appendix as an example only).
RCA Remote Control Address, to be configured, via the unit front panel (CONFIG:REMOTE)
ESA EDMAC Slave Address (Range)
Local modem is configured as EDMAC master
Distant-end modem is an EDMAC slave
CDM-625/A, CDM-570/A, CDM-570L/AL, and CDM-600/L modems employ a point-to -
point internal serial communication bus within the DB-25 or DB-9 cable to the Switch. Figure C-1
shows the external EIA-232 addressing scheme for these modems; Figure C-2 depicts the external
EIA-485 connection for this configuration.
SLM-5650/5650A and CDM-7XX modems employ a point-to-point internal serial
communications bus within the HD-15 cable to the Switch. Figure C-3 shows the external
EIA-232 addressing scheme for these modems; Figure C-4 depicts the external EIA-485
connection for this configuration.
CDM-Qx/QxL modems require an external multi-drop EIA-485 connection. Figure C-5 shows the
external EIA-232 addressing scheme for a system comprising these modems with a Switch;
Figure C-6 depicts the external EIA-485 connection for this configuration. See Figure C-7 for a
distant-end CRS-300/Qx/QxL setup using Traffic modems in EDMAC Slave Mode.