Comtech EF Data CRS-200 - Manual (Page 13)

Rev. 1 1–1
1
Chapter 1.
INTRODUCTION
WARNING
Please note that the CRS-200 has been designed specifically as an accessory
product for the Comtech EFData CDM-500, CDM-550 and CDM-550T
modems, and should not be used with any other manufacturer’s equipment.
The CRS-200 1:10 Redundancy Switch, for use with the CDM-500, CDM-550 and
CDM-550T modems, provides fully automatic protection of traffic circuits in the case of
equipment failure, and is intended for hub applications.
If all modems within a group are connected to the same up/downconverter, no external IF
switching is required. However, where operation with more than one up/downconverter is
required, the user may add the CRS-280 IF Switch, which permits connection to as many
converters as there are Traffic modems.
The CRS-200 will support all of the interface types available on the modem, which
includes EIA-422/ EIA-530 DCE, V.35 DCE, X.21 DCE and DTE and EIA-232, sync
and async. Note that, unlike many other products of this type, electrical interface types
may be mixed within the same redundancy group.