3com 5108M-TP User Manual

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1 - 6 ONline Ethernet 10BASE-T Module User’s Guide
On position, therefore, all ports are initially enabled. Table 1-2 describes the 
settings and functions for switches 1 through 8.
If you have an ONline Ethernet Network Management Module installed in 
your concentrator, you can remotely override these switch settings. Refer to 
the  ONline Ethernet Network Management Module Installation and 
Operation Guide 
for information on remotely managing the ports.
Dip Switch SW3 (Crossover Mode, Channel Select, Squelch)
The four switches on dip switch SW3 allow you to:
set port 8 to uncrossed mode
select a channel for the module
set the Squelch level to high (normal) or low (sensitive)
The switches are labeled 1 through 4 and the settings affect all eight ports. 
Switch 1 allows you to enable or disable crossover mode for port 8. The 
channel is initially configured for channel 1 (default) and Squelch level is 
initially configured for high (default). The following sections explain the 
crossover, channel selection, and Squelch mode.
If you have an ONline Ethernet Network Management Module installed in 
your concentrator, you can remotely override these switch settings.
Table 1-2.  Dip Switch SW1 Settings and Interpretations
Switch
Function
Factory 
Default
Switch Setting 
Off
On
1 - 8
Enable/disable port
enable
disable
enable