Kantronics KPC-9612 Plus, Руководство пользователя, Страница: 125 / 348

Connected vs Unproto
There are two ways to send data in packet radio, connected or unproto (uncon-
nected). In the Connected Mode you first establish a connection. Then your TNC
will send packets to that specific station and expects acknowledgments in return.
If an acknowledgment is not received, the TNC will resend the data (depending
on the setting of AX25L2V2, it may send a poll first). The RETRY parameter
will determine how many times this is done before the connection is lost due to
bad conditions. If the acknowledgment is received, the TNC is happy and will
send more data when available. Therefore the Connected Mode, barring impossi-
ble conditions, assures that the station you are connected to will receive every-
thing you say, and in the order you say it.
In the Unproto Mode, when your TNC sends a packet, no acknowledgment is ex-
pected and no retries are attempted. This mode is often used for calling CQ, for
transmitting beacons, and for informal roundtable chats.
Monitoring and Calling CQ
If you turn the MONITOR command ON, you will see other people’s packets on
your screen. You will notice two callsigns at the beginning of each packet sepa-
rated by a “>”. The first callsign is the station the packet is from, and the second
callsign is the station the packet is to. An Unproto packet may have a name or
CQ for the second callsign.
To set what will be seen as the “to” callsign for Unproto packets you send, you
use the UNPROTO command. This comes defaulted as CQ.
In order to call CQ you must get into the Convers Mode, so that what you are
typing to the TNC will be interpreted as data to be sent out on the air and not as
commands. To do this type:
K<CR>
Now anything you type will be packetized and sent out on the air. Remember to
get back to Command Mode you enter a <Ctrl+C> (default) by holding down the
Control key while pressing “C”. You will be going between Command and
Convers Modes depending on whether you want to talk to the TNC or have the
TNC packetize what you type to go out on the air.
Packet Mode of Operation Modes of Operation
KPC-9612 Plus v 8.2 109 User’s Guide