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+ Kantronics TNCs support additional, advanced UI digipeating commands. For a
description of Kantronics’ UI digipeating commands, see “Advanced GPS/APRS
digipeating”, in the GPS Mode of Operation section of this chapter.
Gateways
In Kantronics’ multi-port devices (e.g., Kantronics KAM Plus and KPC-9612
Plus), a Gateway is also available.
Using a gateway is similar to digipeating except that the retransmission of the
packet takes place on another radio port of the TNC other than where it was re-
ceived. In other words, if you are on VHF and send a packet via a Gateway
callsign of a KAM, your packet would be retransmitted on HF on whatever fre-
quency the radio connected to the KAM is set for. When you use one of these
gateways on HF, remember that on HF the baud rate is slower so you may want
to lengthen some of your timing parameters. See the KA-Node section for an-
other way to accomplish this with a more reliable connection.
Multi-Connects
The TNC makes it possible for you to talk to more than one person at the same
time. Single port TNCs such as the KPC-3 Plus support 26 streams on the one
port.
+ Multi-port TNCs (e.g., KPC-9612 Plus) support 26 streams per port.
The command MAXUSERS determines how many streams may be used at one
time, per port, and the command USERS determines how many people can con-
nect to the TNC per port. An incoming connect uses the next available stream. If
the number of streams set by USERS is full, then a station attempting a connect
with your TNC will receive a busy message instead of a connect. However, if
MAXUSERS is set larger than USERS, you can still issue outgoing connects on
additional streams.
To determine which port you are on, simply use the STATUS command, typing
STAT at the command prompt. The TNC will report which streams are active and
which one you are on. If you wish to remain on the current stream to communi-
cate, no action is necessary. To change streams ( to make another connect or to
send data to another station already connected to you) type the STREAMSW
character, the number of the port (if you are changing ports on a multi-port
Overview of Packet Communication
Packet Modes of Operation
KAM’98 v 8.3
149
User’s Guide
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