Comtech EF Data CDM-760 - Manual (Page 34)

Introduction Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
1–8
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M:N redundancy support is available using the CRS-500 M:N Redundancy System. The
CRS-500 can be used only for CDM-760 1:10 operation with the 10/100/1000 BaseT
Gigabit Ethernet and G.703 E3/T3/STS-1 data interfaces. The CRS-500 may not be used
with any other data interface, nor can it be used for redundancy in MultiStream mode.
These Rear Panel Rack Support Brackets Kits are available from Comtech EF Data:
• KT-0000168 4” Rear-Mounting Support Brackets Kit
• KT-0000195 10” Rear-Mounting Support Brackets Kit
This Power Interface Option is available from Comtech EF Data:
• 48 VDC Primary Input Power Supply with Screw-in Fuse Holders.
These FUTURE Power Interface Options will be available from Comtech EF Data:
• 24 VDC BUC 90 Watt Power Supply (AC Input or DC Input versions).
• 48 VDC BUC 150 Watt Power Supply (AC Input or DC Input versions).
1.2.4 Verification
The CDM-760 includes many test modes and loopbacks for rapid verification of the correct
functioning of the unit. Of particular note is the IF loopback, which permits the user to perform
a quick diagnostic test without having to disturb external cabling.
During IF loopback, all of the receive configuration parameters are temporarily changed to
match those of the transmit side, and an internal IF switch connects the modulator output to
the demodulator input. When normal operation is again selected, all of the previous values are
restored.
1.2.5 On-site Firmware Updates
Chapter 4. UPDATING FIRMWARE
Field update of the operating system firmware is possible through file upload via satellite or the
Ethernet port.
1.2.6 On-site Operational Upgrades
Chapter 5. FAST ACTIVATION PROCEDURE