User Manual

Sonik G2BT Base Transmitter User Manual
March 14, 2002 35 7M487C4
10 USER INTERFACES
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The command line editor accumulates keystrokes from user input into a command line to be
passed to a command line interpreter (CLI) then displays the results of the command. The
editor interacts with the operator allowing characters in the command to be inserted and
deleted before it is submitted to the CLI. A history buffer is maintained for each operator
session containing the previous 20 commands that can be recalled, edited, and resubmitted to
the CLI using the arrow keys.
If current session is logged on as the system administrator or the administrator is not logged
on and the current session is with the front panel console port, the command line editor will
also output the system console messages in-between operator input.
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The front panel serial port, or Console, is managed by a Telnet “translator” task. In its idle
state, the console manager outputs the console messages out the serial port. When an
operator strikes a key the console manager initiates an internal Telnet session and simply
passes characters between the serial port and the TCP/IP socket. This relieves the rest of the
operator interface code from having to support user I/O coming from multiple places and
requiring separate decisions and API calls for all input and output.
Once a user session is initiated on the console port the console messages are no longer
displayed by this task because the command line editor then assumes this responsibility until
the session is exited. Console message output will also be yielded while the system
administrator is currently logged on through Telnet.
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The user interface is presented at the control module’s front panel serial port or when the
system is accessed remotely using the Telnet protocol.
The uses interface allows for reading and modifying configuration parameters as well as
launching calibration, test and reset processes.
There are four levels of access in the user interface: