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X .21 Interface
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1 Int
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X.21 Interface connector
(DB-15)
Ethernet connector
(RJ-45)
Hardware Installation
30
Models 2603, 2621, and 2635 User Manual
3
• Initial Configuration
Figure 7. Rear view of the 2621 showing location of Ethernet and X.21 connectors
When the local third party equipment is configured as DTE, the Model 3086 X.21 serial port can be config-
ured as DCE, and a regular straight-through cable can then be used. Do the following to configure the X.21
port as a DCE:
1.
Open the OnSite device’s case by inserting a screwdriver into the slots and twist the screwdriver head
slightly. The top half of the case will separate from the lower half of the case (see
figure 8
). Take caution
not to damage any of the PC board mounted components.
Figure 8. Case being opened with a screwdriver
2.
Locate the small daughter board on the Model 2621 board to the right of the DB-9 connector (
figure 9
shows location of DTE/DCE daughter board).
