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param
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1994-08-09
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33 lines
param <iface> [<param>]
Invoke a device-specific control routine. A simple 'param
<iface>' will give a list of available parameters, and their current
values, for the interface <iface>. <param> can be the literal
description of the parameter.
On the serial interface, this sends control packets over the
serial port. Example, 'param port1 txdelay 255' will set the keyup
timer (type field = txdelay) on the KISS TNC configured as port1 to
2.55 seconds (255 x .01 sec).
On the radio ports, all timing parameters use a 10ms tick count,
e.g. 30 means 300ms. Some commonly used options are:
slottime - the channel access slottime
maxwait - maximum time to defer transmissions
txdelay - keyup delay before sending data
persist - the csma persistence (range 0-255)
maxkey - maximum time to allow transmitter to be keyed
(range 0-65000)
txtail - time to keep transmitter keyed up after end of packet
NOTE: the txtail parameter is NOT settable, but is always 4
characters duration at the port's speed. The value shown is
calculated from the speed given when the interface is first attached.
When you use the trick previously mentioned to allow interchanging of
DE1200 and DE9600 modems, the txtail shown when a DE9600 modem is used
is WRONG. However, the actual value used is still correct.