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CHARACTER SIZE
Each character that is transmitted from terminal to server is made up of 7 or
8 data bits. Server software automatically formats the characters for transmis-
sion from the server to the service node. Define CHARACTER SIZE as 7 if a
terminal only supports 7-bit operation; otherwise define it as 8. The operator's
guide for the terminal you are using can assist you in determining character
size. The default value is 8.
If
you have AUTOBAUD enabled, the server automatically sets the character
size.
PARITY
PARITY provides a means for the MUXserver 100 to check terminal charac-
ters for transmission errors.
If
a terminal supports PARITY, the parity can be
ODD or EVEN.
If
parity is not supported on a terminal, enter the default
NONE. With AUTOBAUD enabled, the server sets terminal parity
automatically.
NOTE
The MUXserver 100 does not support space parity. Older DIGITAL
terminals, such as the LA36, may require setting up with jumpers
to operate with the server. Refer to the terminal operator's guide
for details.
2.7.3 Flow Control Characteristics
The MUXserver
100/DECmux
II provides the facility to share a com-
munications link between eight or sixteen ports, the potential combined data
rate from these ports usually exceeds the date rate of the composite link, hence
the need for flow control. Flow control is needed on all inputs to the DECmux
II unit, and as the DECmux II unit is capable of outputting data faster than
some terminals can accept it, flow control is needed on output also.
The normal means of flow control on the MUXserver 100 is
XON/XOFF.
The
XOFF or Control-S character is used to request a stop in the data flow and the
XON or Control-Q character to request a start in the data flow.
The SET PORT command on the MUXserver 100 can be used to enable or
disable the
XON/XOFF
flow control for input or output.
30
CHAPTER 2 SETTING UP THE MUXserver 100 AND ITS TERMINALS
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