11
v Note: These hardware installation instructions assume that your Ethernet cabling
is already in place. Thin coaxial Ethernet network cabling should be terminated at
each end with 50 Ohm terminator plugs. A T-connector or transceiver must be
available in the location where you will be installing the router.
Telco Line Connection Requirements
The BR Router is not a line communications device. In order to connect to a wide
area transmission line, you must use a modem, CSU/DSU, or ISDN Terminal
Adapter. Which of these devices you use depends on the type of wide area line to
which you are connecting.
v Note: Before attempting to connect the BR Router to a leased telco line, use the
loopback features of your CSU/DSU’s to check the line. This can save you a
considerable amount of time, since the more equipment you have on the line, the
more difficult it becomes to determine where a problem is occurring.
RS-232 Port
No matter which type of wide are line you plan to connect to, the line
communications device you use must provide an RS-232 connection in order to be
used with the BR Router.
The BR Router includes one DIN-8 to DB-25 RS-232 sync/async data cable. This
cable supports RS-232 asynchronous modems, synchronous leased and switched-
CSU/DSU’s, and North American ISDN Terminal Adapters.
Some Japanese and European terminal adapters may require an adapter plug. For
more information, contact DCB.
v Note: Please use only this cable when connecting your line communication
device to the BR Router. The cables provided with other equipment do not provide
all of the connections required between connector pins for correct hardware
handshaking and synchronous clocking.