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V.35 and X.21 ports 40
Model 3086FR ATM IAD User Guide 4 • Connecting the DSL and data ports
2. Locate the small daughter board on the 3086FR board between the DSL port (RJ-45) connector and the
serial port connector (
Figure 10 shows location of DTE/DCE daughter board).
Figure 10. Location of DCE/DTE board
3. The DTE/DCE daughter board is installed at the factory with the DCE label and arrows pointing towards
the X.21 connector (DCE configuration). To change to DTE configuration, lift the daughter board from
the connector, turn it around so that the DTE label an arrows point to the X.21 connector, and place it
back on the connector. The X.21 port is now configured as a DTE.
Note
When the X.21 port is configured as a DTE, the clocking mode for the port
must be set for external clock.