METRObility Optical Systems 3508-11 - Manual (Page 7)

Lancast 8-Port CenturySwitch 7
Install the Fiber Module (Optional)
Proceed to Step 5 if you are not using a fiber module.
The standard 10/100 TX module installed in the CenturySwitch may be
replaced by a 100Base-FX module. Refer to the listing inside the front
cover for all available options.
Set the Backpressure Jumper
Prior to installing the fiber module, you must set the flow control/
backpressure jumper labeled “JP2” on the printed circuit board. See the
diagram below for its location.
• Connect jumper pins 1 and 2 to enable backpressure.
• Connect jumper pins 2 and 3 to disable backpressure. (default)
4
Set the Duplex Mode Switch
Each fiber module can be configured for half duplex (HDX) or full
duplex (FDX) operation by means of the slide switch located on the front
panel. This switch should be set before applying power. The default
setting on the modules is FDX (full duplex).
Install the Module
To install your FX module, first remove the TX interface by turning the
two thumb screws counterclockwise and withdrawing the card. Replace it
with the new module. Tighten both screws firmly to attach the fiber
module to the CenturySwitch.
JP2
1 2 3
Jumper JP2