Hardware installation
27
WAN Access Routers Getting Started Guide
3 • Initial configuration
2. Locate the small daughter board on the LR121A board to the right of the DB-9 connector (see
figure 9
)
shows location of DTE/DCE daughter board).
Figure 9. Location of DTE/DCE board
3. The DTE/DCE daughter board is installed at the factory with the DTE label and arrows pointing towards
the X.21 connector (DTE configuration). To change to DCE configuration, lift the daughter board from
the connector, turn it around so that the DCE 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 DCE.
Note
When the X.21 port is configured as a DTE, the clocking mode for the port
must be set for external clock.
4. Re-assemble the case.
The interface cable has been installed, go to section
“Installing the AC power cord”
on page 29.
In this example, the DCE/DTE strap is
configured for DCE because the DCE label
on the strap is pointed toward the
X.21 connector
X.21 connector
Summary of Contents for LR120A
Page 1: ...LR120A LR121A LR122A LR125A WAN Access Routers Getting Started Guide...
Page 24: ...19 Chapter 2 Product Overview Chapter contents Introduction 20 Applications overview 21...
Page 115: ...110 Appendix B Cable recommendations Chapter contents Ethernet Cable 111 Adapter 111...
Page 128: ......
