Comtech EF Data CRS-100 - Manual (Page 35)

MN-CRS100.IOM 7–1
Chapter 7. SUMMARY OF
SPECIFICATIONS
Equipment Type 1:1 Redundancy Switch
Modems
Supported CDM-500, CDM-550 and CDM-550T Digital Satellite Modems
Operating Modes Fully automatic
Manual (via the front panel of the Online Modem, or via the Modem’s
remote control interface )
Architecture Full bridging architecture, with configuration synchronization
Tx Clock and Data signals fed to both Online and Standby units
Rx IF signal fed to both Online and Standby units
Continuous fault comparison of Online and Standby units
The configuration of Online and Standby units synchronized via the
Auxiliary Serial link between the two Modems
Switch Conditions Switchover initiated following:
Unit faults only, or:
Unit faults or Receive Traffic Faults, or:
Unit faults or Transmit Traffic Faults, or:
Unit faults or Receive or Transmit Traffic Faults
Fault detection
time 0.5 seconds maximum
Switchover time Within 0.1 seconds of fault detection
Data Interface
Types EIA-422/EIA530 DCE (also supports X.21 DCE and DTE)
V.35 DCE
Synchronous EIA-232
Asynchronous EIA-232 (maximum data rate: 56 kbaud, and when
used with CDM-550 or CDM-550T only)
Automatic selection performed by modem
Pinout Per EIA-530 (25 pin ‘D’ type female)
IF Switching
/Splitting Tx IF: Switched by RF relay (0.3 dB max loss)
Rx IF: Passive power splitting (3.5 dB max loss)
IF Impedance Both 50 and 75 Ω supported
IF Connectors BNC female