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Hardware Reference 21
C613-03087-00 Rev E
Asynchronous port The asynchronous serial port (ASYN0) provides a general purpose port for
terminals, printers or modems. The port is wired as a DTE (Table 9 on page 50).
The default communications settings are:
• 9600 bps
• 8 data bits
•1 stop bit
•no parity
• hardware flow control
PIC bays The AT-AR750S-DP chassis has two PIC bays, which can accommodate
combinations of the following PICs:
■ AT-AR020 PRI E1/T1 PIC, one primary rate E1/T1 port.
■ AT-AR021(S) BRI-S/T PIC, one basic rate ISDN S/T port.
■ AT-AR023 SYN PIC, one synchronous port with universal 50-way
AMPLIMITE connector.
■ AT-AR024 ASYN4 PIC, four asynchronous ports with RJ-45 connectors.
Restart with default
configuration
To restart the router with the default configuration, either press the Reset
button on the front panel of the router, or use the command:
restart router config=none
This immediately restarts the router with the default configuration specified in
the
boot.cfg file. The factory-loaded default configuration is shown in the
Installation and Safety Guide. If the file has been removed, the router restarts
with no configuration. We recommend leaving
boot.cfg unchanged, so that
you can revert to the original configuration if necessary.
To return the router to the previous user configuration, restart the router by
using the command:
restart router
This restarts the router with the startup configuration file previously specified
by the command:
set config=filename
The restart reboot command or a power cycle also reload this user
configuration. For information about configuration files, see the Managing
Configuration Files and Software Versions chapter in the Software Reference.
AT-PWR03 Power Supplies
The AR750S-DP comes with the option of installing one or two AT-PWR03
power supplies. When two are fitted, they must be the same type of current,
either both AC or both DC.
The AR750S-DP should use only the AT-PWR03 power supply. Do not use any
other power supply to power this router.
You can create triggers to execute scripts when specific PSU events occur. For
more information, see the Trigger Facility chapter in the AR700 Series Router
Software Reference.