American Fibertek MRX-8610C-SL - Manual (Page 5)

5
DATA CONFIGURATION
There is a rear panel data configuration switch bank preset at the factory for Sensornet
data transmission. With the exception of switch # 5, these switches must remain in the
positions shown below to properly transmit Sensornet data. Switch # 5 is used to apply a
120
Ω termination resistor across the data I/O connections. These units are shipped
with the data input/output connections unterminated. Move switch # 5 to the down
position if termination is required for your application.