
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.

     
