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Setting the serial ports data-rate
The Set Port Speed command sets the default data-rate for the serial port.
Valid data-rates are 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200.
To set the serial port data-rate:
At the Sentry: prompt, type set port speed, follow by the data-rate and press Enter.
Example
The following command sets the serial ports data-rate to 38400 BPS:
Sentry: set port speed 38400<Enter>
Enabling or disabling active signal checking for serial connections
The Set Port Dsrchk command enables or disables active signal checking for serial connections to
devices attached to any of the available serial ports.
To enable or disable active signal checking for serial connections:
At the Sentry: prompt, type set port dsrchk, followed by serial port name, on or off, and press Enter, or
Type set port dsrchk all, on or off, and press Enter.
Examples
The following command disables active signal checking for the Modem serial port:
Sentry: set port dsrchk modem off<Enter>
The following command disables active signal checking for all serial ports:
Sentry: set port dsrchk all off<Enter>
Setting the serial port timeout value
The Set Port Timeout command is used to set the serial port inactivity timeout period. The timeout
period defines the maximum period of inactivity before automatically closing the Pass-Thru session.
The valid range for the period parameter is 0 to 5 (in minutes). The default period is 5.
NOTE: Setting the timeout to ‘0’ disables the timer.
To set the serial port timeout value:
At the Sentry: prompt, type set port timeout, followed by a value from 0 to 5 (in minutes) and press
Enter.
Enabling or disabling modem initialization strings
By default, the Sentry assumes an external modem is attached to the Modem port and sends
initialization strings to that modem as necessary. The Sentry sends the initialization strings under the
following conditions:
• System start –DSR is high and DCD is low
• Normal operations – If DSR transitions from low to high and DCD is low
• Normal operations – After a session initiated from the Modem port ends
• Normal operations – After a Pass-Thru connection to the Modem port is disconnected
The Set Modem command is used to enable or disable these initialization strings.
Predefined initializations strings are enabled by default.
To enable or disable the modem initialization strings:
At the Sentry: prompt, type set modem inits, followed by on or off, and press Enter.
Example
The following command disables the modem initialization strings for the Modem serial port:
Sentry: set modem inits off<Enter>
Sentry PT22 Operations • 35
Installation and Operations Manual