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Enabling or disabling active signal checking for serial/Pass-Thru connections
The Set Port Dsrchk command enables or disables active signal checking for serial/Pass-Thru
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 enables active signal checking for Pass-Thru port 1:
Sentry: set port dsrchk 1 on<Enter>
The following command disables active signal checking for all serial/Pass-Thru ports:
Sentry: set port dsrchk all off<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>
Editing modem initialization strings
The predefined modem initialization strings may be edited by an administrative user. The Init 1 and Init 2
strings may be up to 48 characters each and the Attention and Hang-up strings may be up to 16 characters.
For more information on the predefined initialization strings, see Enabling or disabling modem initialization
strings: on page 15.
Editing modem initialization strings:
At the Sentry: prompt, type set modem, followed by attn, hangup, init1, or init 2 and the initialization
string. Press Enter.
Examples
The following command set the Init 2 string to ‘AT E0 Q1 S0=3 S2=64 S12=50 &C1 &D2’:
Sentry: set modem init2 AT E0 Q1 S0=3 S2=64 S12=50 &C1 &D2<Enter>
32 • Operations Sentry Commander - PT40
Installation and Operations Manual