Mocomtech CRS-300 - Manual (Page 239)

B–1
Appendix B. ADDRESSING
SCHEME INFORMATION
B.1 Introduction to Addressing
A CRS-300 1:10 Redundancy Switch provides 1:10 redundancy; that is, it is capable of controlling
up to 10 traffic modems and one redundant modem.
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-230 Switch Controller card (installed in the CRS-300).
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-570/570L, CDM-600/600L, CDM-625,
CDM-700, CDM-710 and SLM-5650/5650A 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 Switch to modem communications on the CDM-Qx/QxL modems, the Switch uses EIA-485
communications via a DB-9 multi-drop cable that is connected from the “485 Pass-Through”
connector on the CRS-230, then daisy-chained to each of the modems.
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-300 1:N Redundancy System.