Timewave DSP-232, Operating Manual

Page: 93 / 271

Chapter 5 Packet Operation
Disconne
Immediate Command
Mode: packet Host: DI
DISCONNE is an immediate command that initiates a disconnect command to the station to you’re connected to. If
your disconnect command is successful, your monitor will display:
*** DISCONNECTED:
(
call
)
Other commands can be entered while a disconnect is in progress. New connections aren’t allowed until the
disconnect is completed.
Note : if another disconnect command is entered while your DSP is trying to disconnect, your DSP will
instantly switch to the disconnected state.
DWait n Default: 16 (160 mS)
Mode: packet Host: DW
“ n ”
0 to 250 specifies wait time in 10 mS intervals.
Unless the DSP is waiting to transmit digipeated packets,
DWAIT
forces your DSP to pause
DWAIT
x 10 mS after
last hearing data on the channel before keying your transmitter.
DWAIT
is an old way collisions with digipeated packets were avoided. These days, the P-Persistent method is
generally used. With PPERSIST ON (default) the DWAIT timer is ignored.
FRack n Default: 5 (5 sec.)
Mode: packet Host: FR
“
n ”- 1 to 15, specifying timeout in 1 second intervals.
FRACK is the FRame ack nowledgment time in seconds that your DSP will wait for ack nowledgment of a sent
protocol frame before “retrying” that frame.
After sending a packet requiring
ack nowledgment, the DSP waits for
FRACK
seconds before incrementing the retry
counter and sending another frame. If the packet address includes any digipeaters, the time between retries is
adjusted to:
Retry interval (in seconds) = n x (2 x m+1), where “m” is the number of intermediate relay stations.
When a packet is retried, a random wait time is added to any other wait times. This avoids lockups where two
packet stations repeatedly collide with each other because of timing conflicts.
FRIck n/n Default: 0/0 (0 sec.)
Mode: packet Host: FF
“
n ” 0 to 250, specifying the FRACK timeout for meteor scatter work in 10 mS increments.
FRICK is a short version of FRACK , meant to be used in packet radio meteor scatter work. If FRICK is 0 (default),
the
FRACK
timer is then used and the DSP operates as before with the retry timer in units of whole seconds. If
FRICK is 1 to 250, it overrides FRACK as the unit’s retry timer, and the retry timer is in units of 10 mS up to 2500
mS (2.5 seconds).
Unlike
FRACK
,
FRICK
doesn’t take into account the number of digipeaters in the connect path.
FRICK
assumes
that no digipeaters are being used.
5-32 September, 05