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Comtech EF Data SMS-7000 M:N Modem Protection Switch

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  • Programmable modem priority
  • Programmable switching delay
  • Remote Monitor and Control (M&C)
  • Universal Terrestrial/User interface


General Specifications
Frequency Range50 to 180 MHz
Impedance at IF Ports75 Ohms (50 Ohms optional)
Return Loss> 18 dB
Transmit IF Loss< 1.5 dB
Receive IF Loss< 5 Db
Online ModemsExpandable from 1 to 8 with plug-in panels
Backup Modems1 or 2
Data InterfaceEIA-422/499 (MIL-STD-188), V.35, 8 kbit/s,

G.703 balanced/unbalanced
Auxiliary InterfaceADPCM Audio, ESC, Alarms
Operating ModesDependent or Independent Switching

Control Unit Size:19" W x 20.1" D x 1.7" H (1 RU)

(48.2 cm x 51.0 cm x 4.3 cm)
Control Unit Weight:< 10 lbs (4.5 kg)
Switch Unit Size:19" W x 4.5" D x 13.9" H (8 RU)

(48.2 cm x 11.4 cm x 35.3 cm)
Switch Unit Weight:< 20 lbs (9.0 kg)
Input Voltage:



90 to 264 VAC, 50 to 60 Hz, 50W max.

48 VDC, 50W max.
Output Backup ModulatorWithin ± 0.25 dB of prime when switched online
Modem PriorityThree Levels, programmable
Remote M&C InterfaceEIA-485 or EIA-232C
Control & MonitorControl and monitor of all switch functions via front

Transponders8 uplinks, 8 downlinks

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