Installing the Modem
Configuring the Modem
The modem obtains some operating characteristics from jumper settings. The default jumper settings are for
common 4-wire full-duplex applications. To reconfigure the modem for 2-wire half-duplex and special applications,
you must change the default jumper settings.
To change jumper settings, push the two tabs on the back of the modem to open the modem cover and gain access to
the jumper settings on the printed circuit board (see Figure 2-4). Then set the jumpers to the desired settings and
replace the cover.
Figure 2-4. Gaining Access to the Modem Jumpers
Figure 2-5 on the next page shows the location of the modem jumpers. Table 2-1 on page 8 summarizes the jumper
settings (default settings are
bold
).
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