43
A channel may be manually disconnected from its associated Telnet session with the
SET MPX
DISCONNECT=<chan>
command. Otherwise, the connection will remain open until disconnected either by the
Telnet client or a
DETACH MPX
command.
4.7.2
Unit Options
Unit options that may be specified are:
Option
Action
FASTTIME
Use optimized timing; default
REALTIME
Use realistic timing
CAPSLOCK
Upshift lowercase input characters to uppercase
NOCAPSLOCK
Input characters are unchanged; default
LOG=<filename>
Enable I/O logging
NOLOG
Disable I/O logging; default
The 12792C supports twelve programmable baud rates from 50 to 19200 baud. When realistic timing is enabled,
the simulation accurately models the transmission and reception baud rates (in machine instructions). For
example, setting the interface to 1200 baud will take twice as long to output a given listing as setting the interface to
2400 baud. Optimized timing reduces the timing to the minimum necessary to operate correctly; this is much faster
than a real multiplexer would operate.
Setting the multiplexer to fast timing also enables three optimizations. First, buffered characters are transferred via
Telnet in blocks, rather than one character at a time. Second, ENQ/ACK handshaking is done locally, without
involving the Telnet client. Third, when editing and echo is enabled, entering BS echoes a backspace, a space,
and a backspace, and entering DEL echoes a backslash, a carriage return, and a line feed, providing better
compatibility with prior RTE terminal drivers.
Many HP operating systems require command input in upper case, although mixed-case output is supported. As
an aid to avoid toggling the host keyboard in and out of CAPS LOCK mode, the multiplexer provides this function
locally. The default mode is
NOCAPSLOCK
.
Each multiplexer channel supports independent I/O logging to a file. Disabling logging also closes the log file.
The device configuration may be displayed with the following commands:
Command
Action
SHOW MPX
Display the device configuration
SHOW MPX LINEORDER
Display the channel connection order
SHOW MPX CONNECTIONS
Display the channel connections
SHOW MPX STATISTICS
Display the channel I/O statistics for the active connections
The unit configuration may be displayed with the following commands:
Command
Action
SHOW MPX<n>
Display the selected channel’s configuration
SHOW MPX<n> LOG
Display the selected channel’s logging status
