Installing the gateway router
28
SmartNode 4650 Getting Started Guide
3 • SmartNode installation
The SN4650’s V.35 interface is wired as a DTE. No DCE configuration is possible. If you are directly connect-
ing the SN4650’s V.35 interface to third-party equipment that cannot be configured as a DCE, you must use a
tail-circuit cable. You can purchase a tail-circuit cable from a datacom-supply vendor. A tail-circuit cable will
cross-over the necessary V.35 signals so that the two DTE interfaces can communicate.
Note
Some third-party equipment will not be able to work properly in
DTE-to-DTE configurations even when using a tail-circuit cable.
Please refer to your third party equipment user manual for informa-
tion on DTE-to DTE operation.
The SN4650’s V.35 interface requires a cable with a male DB-25 connector. Attach the male DB-25/M35 con-
nector of the V.35 cable to the female DB-25 connector on the SN4650. Attach the other end of the cable to
the V.35 connector on local V.35 modem or multiplexer device.
Note
For information on configuring the V.35 port, refer to the
SmartWare
Software Configuration Guide
which is available on the CD-ROM
shipped with your unit and on the web at http://www.patton.com.
Installing the X.21 interface cable.
The SmartNode Model 4650 comes with an option for an X.21 interface
presented on a DB-15 female connector (see
figure 7
).
Figure 7. Rear view of the SN4650 showing location of X.21 interface connector
ISDN S/T
BRI ports 0/0 – 0/4
Life-line
ports
Power
(12V DC, 1.25A)
SN4658
ACT
LINK
ACT
LINK
X.21 serial port connector
12V, 1.25A
+
-
12V
, 1.25A
–
+
