User guide

USR4204 User Guide
Page 32 of 69
Arm Ctrl-B for Break Menu (Main Menu  W)
At the top of the Arm Ctrl-B for Break Menu is the menu name. Below that is a list of valid
commands, text, and status. Invalid commands are ignored.
From this menu, the serial ports are armed to reboot the USR4204 power ports while a
serial port is connected, and also are armed to transmit an RS232 break signal from a serial
port while connected. Rebooting while connected to a serial port allows a User to observe
the messages sent from the attached equipment during the entire power-up cycle. Sending
a break signal from a serial port during a power-up sequence is useful to force the operating
system of Cisco routers into ROMmon diagnostic mode.
'A'-'D' Arm and Connect to Console
These Connect commands create a full duplex data connection between the USR4204
terminal port and one of its serial ports, and arms the Ctrl-B, Ctrl-R, Ctrl-T, and Ctrl-Z
commands. The terminal port is fixed at 9600bps, 8N1. The rate and format of serial ports
are programmable to match the console port of the attached equipment. The current serial
port parameters are shown in parentheses next to the port name.
To close a connection to a serial port, use the Escape Sequence. The Escape Sequence is a
string of identical characters typed rapidly without surrounding characters. The default
Escape Sequence is "---".
A serial port will automatically close upon loss of the DCD/DTR RS-232 signal on the
USR4204 terminal port, unless the DCD override is ON. Whenever a serial port closes due
to a loss of the DCD/DTR, the serial port automatically transmits an Escape Sequence for
the purpose of closing any downstream serial port of a cascaded USR4204.
'W' Arm Ctrl-B for Break (one-shot)
Arm Ctrl-R to Reboot Pwr 1
Arm Ctrl-T to Reboot Pwr 2
Ctrl-Z to Cancel Arming
Select Port:
CMD
'A' Connect "Console A "( 9600 None )
'B' Connect "Console B "( 9600 None )
'C' Connect "Console C "( 9600 None )
'D' Connect "Console D "( 9600 None )
'-' Refresh MAIN Menu