Comtech EF Data CDM-600/600L - Manual (Page 41)

CDM-600/600L Open Network Satellite Modem Revision 3
Introduction MN/CDM600L.IOM
1–13
QPSK/OQPSK, and all data rates greater than 2 Mbps). M&C information is added (transparent
to the user), allowing access to the distant-end modem.
In addition, EDMAC-2 uses 1.6% overhead in all modes for those applications where the 5%
overhead is excessive. The EDMAC and EDMAC-2 modes do not require any additional cabling
at either the local or distant-end Modems. Access to EDMAC is via the standard M&C control
port. Full monitor and control is possible, and the on/off status at the distant-end carrier can be
controlled.
See Chapter 9. EDMAC CHANNEL for further information.
1.3.11 Flash Upgrading Modem Firmware
The internal firmware is both powerful and flexible, permitting storage and retrieval of up to 10
different modem configurations. The modem uses ‘flash memory’ technology internally, and new
firmware can be uploaded to the unit from an external PC. This simplifies software upgrading,
and updates can be sent via the Internet (from Comtech EF Data’s Web server), e-mail, or on CD.
The upgrade can be performed without opening the unit, by simply connecting the modem to the
serial port of a computer.
See Chapter 4. FLASH UPGRADING for further information.
1.3.12 Fully Accessible System Topology (FAST)
The CDM-600/600L is extremely flexible and powerful, and incorporates a large number of
optional features. In order to permit a lower initial cost, the modem may be purchased with only the
desired features enabled.
If, at a later date, a user wishes to upgrade the functionality of a modem, Comtech EF Data provides
Fully Accessible System Topology (FAST), which permits the purchase and installation of options
through special authorization codes loaded into the unit either via the front panel keypad or entered
remotely via the remote port located on the modem rear panel.
These unique access codes may be purchased at any time from Comtech EF Data.
FAST System Theory
FAST facilitates on-location upgrade of the operating feature set without removing a modem
from the setup.
With FAST technology, operators have maximum flexibility for enabling functions as they are
required. FAST allows an operator to order a modem precisely tailored for the initial application.
When service requirements change, the operator can upgrade the topology of the modem to meet
those requirements within minutes. This accelerated upgrade can be accomplished because of FAST’s
extensive use of the programmable logic devices incorporated into Comtech EF Data products.
FAST Implementation
Comtech EF Data’s FAST system is factory-implemented in the modem. All FAST options are
available through the basic platform unit at the time of order – FAST allows immediate activation of
available options, after confirmation by Comtech EF Data, through the front panel keypad or via the
remote control interface.