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Command Descriptions,
"hdlc" Command
2000592-001
Continued
This command may be used to override default values for several
parameters related to the DataNET protocol. Specific forms of the
command are:
hdlc setuptime
hdlc setuptime time
hdlc window
hdlc window num
Displays the current "setup time" value, in
microseconds. This is the time that the
ANCB/DN board will transmit a "preamble"
pattern on a DataNET link before starting
the actual data frame. The preamble
allows time for the receiver circuitry at the
far end of the link to adjust to the incoming
signal's amplitude, phase, and frequency.
The default setup time is 2500
microseconds.
Sets the DataNET setup time to the value
given, in microseconds. The new setup
time value is saved in non-volatile
memory.
Displays the transmit "window" size used
by DataNET. This is the number of I-
frames (Information frame) that a station
may send before it must receive a low-
level acknowledgment from the receiving
station.
Sets the transmit window used by ports 1
and 2 on the ANCB. The parameter "num"
must be a number 1 through 7. The
default window size is 7.
Command Summary • 39
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