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Chapter 5. The Firmware Upgrade Utility
29
Local and Remote Mode
To prepare for the Firmware Upgrade of both Local and Remote units, do the
following:
1. Turn off both CE680L / CE690L and CE680R / CE690R units and unplug
their power adapters.
2. Make sure both units are connected using a Fiber Optic cable via the
CE680L / CE690L's Optical In/Out ports.
3. Plug in the power adapter and power on the CE680R / CE690R.
4. Push and hold the Operation Mode pushbutton on the CE680L / CE690L
front panel. This enables the Local / Remote Unit to operate in Firmware
Upgrade Mode. Note that the LEDs on both Local and Remote units start
flashing.
5. Use a Serial RS-232 cable to connect a COM port on your computer to the
CE680L / CE690L’s RS-232 port.
Note: The Serial RS-232 cable is not provided in the package.
CE680L / CE690L
Fiber Optic cable
CE680R / CE690R
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