Comtech EF Data SMS-7000 M:N Modem Protection Switch
- Programmable modem priority
- Programmable switching delay
- Remote Monitor and Control (M&C)
- Universal Terrestrial/User interface
SMS-7000 M:N Protection Switch
The Comtech EFData SMS-7000 M:N Protection Switch utilizes fewer cables and occupies less rack space than the previous generation of M:N switches. The SMS-7000 is designed to allow maximum flexibility by incorporating a Universal Terrestrial/User interface.
The SMS-7000 is composed of a control unit and switch unit. A single control/alarm cable connects both units. The control unit (1 RU) is mounted in the front of the rack and the switch unit (8 RU) can be installed in the rear or top of the rack. The control unit gives the user maximum control of the switch in the smallest amount of front-side rack space. The control unit contains an extensive M&C system and is fully controllable from the front panel or from the external EIA-232C/485 port located on the backside of the control unit.
The switch unit is mounted on a locking hinge, allowing the unit to be tilted from the rack. This allows easy access to back plane connectors and to equipment in the rack. The switch unit supports industry standard interfaces, eliminating the need for a separate breakout panel.
The IF section of the switch unit is from 50 to 180 MHz on the uplink and the downlink side, allowing for both narrow band and wideband transponders to be served.
The SMS-7000 can be configured for up to eight prime modems and two backup modems, with dedicated IF uplink and downlink ports for each channel. This feature enables the lowest possible loss of signal, while giving the user maximum flexibility in routing IF signals to/from their desired feeds. The switch allows IF and data signals of any prime modem to be switched to the next available backup modem, and for priority programming of the prime modems for backup.
The SMS-7000 is compatible with most Comtech EFData modems and support products. Please contact your Comtech EFData sales representative to determine product compatibility specific to your application.
|Frequency Range||50 to 180 MHz|
|Impedance at IF Ports||75 Ohms (50 Ohms optional)|
|Return Loss||> 18 dB|
|Transmit IF Loss||< 1.5 dB|
|Receive IF Loss||< 5 Db|
|Online Modems||Expandable from 1 to 8 with plug-in panels|
|Backup Modems||1 or 2|
|Data Interface||EIA-422/499 (MIL-STD-188), V.35, 8 kbit/s,|
|Auxiliary Interface||ADPCM Audio, ESC, Alarms|
|Operating Modes||Dependent 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)|
90 to 264 VAC, 50 to 60 Hz, 50W max.
48 VDC, 50W max.
|Output Backup Modulator||Within ± 0.25 dB of prime when switched online|
|Modem Priority||Three Levels, programmable|
|Remote M&C Interface||EIA-485 or EIA-232C|
|Control & Monitor||Control and monitor of all switch functions via front|
|Transponders||8 uplinks, 8 downlinks|