Chapter 5. The Firmware Upgrade Utility

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.

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CE680L / CE690L

Fiber Optic cable

CE680R / CE690R

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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.

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