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COMSPHERE 3800 Series Modems
2-6 September 1998 3810-A2-GB30-30
DTE Connection
Use the following procedures to connect the
EIA-232-D cable and ferrite choke from the modem to the
DTE:
1. Make sure the modem’s rear panel power switch is
Off.
2. Connect the DB-25 plug on the cable to the DB-25
socket labeled DTE on the modem’s rear panel.
See Figure 2-4. Use a small screwdriver to fasten
the cable to the modem.
3. Connect the other end of the cable to the DTE.
Use a small screwdriver to fasten the cable to the
DTE.
To ensure compliance with FCC Part 15 Regulations, a
ferrite choke must be installed on the EIA-232-D interface
cable.
1. Open the ferrite choke and place it around the
DTE cable as close as possible to the connector
attached to the modem.
2. Close the two halves around the cable and snap
the ferrite choke shut, pressing down on the plastic
latch to secure it.
3. Install a cable tie behind the ferrite choke to
prevent it from sliding along the cable.
98-13144-01
Ferrite
Choke
DTE
Connector
Cable Tie
Figure 2-4. Model 3810 and 3820 DTE Cable and Ferrite Choke Installation