Packet Operation; Packet Mode - Kenwood TM-D710A (K type) Instruction Manual

Connect this transceiver to your personal computer via a Terminal Node Controller (TNC). You can send messages
or commands to far away stations, obtain a variety of information via your local bulletin boards, or enjoy other Packet
applications. Reference material for starting Packet operation should be available at any store that handles Amateur
Radio equipment.
Note: When the distance between the radio antenna and your personal computer is too close, interference may occur.
DATA terminal pins
• When using the built-in TNC, the DATA
No. Name I/O
q PKD I Audio signal for packet transmission
DE — PKD terminal ground
w
'L' is transmitted and the microphone is
PKS I
e
muted
PR9 O Detected 9600 (bps) data
r
Detected 1200 (bps) data
t PR1 O
Squelch control signal; Closed: 'L', Open: 'H'
SQC O
y (The default settings can be changed in
Menu 520)

PACKET MODE

This transceiver has a built-in TNC which conforms to the
AX.25 protocol. This protocol is used for communications
between TNCs.
For the commands supported by the built-in TNC, see
"TNC COMMANDS LIST".
Press [TNC] 2 times to enter PACKET mode.
The following indicators appear on the transceiver display
to show the current TNC status:
Indicator
PACKET The TNC is in Packet mode.
STA Packets to be transmitted still remain in the buffer.
CON The TNC is in connection with the target station.
The mailbox in the TNC is being accessed or
MBOD
connected by the other station.
The mailbox in the TNC holds mail addressed to
MAIL
you.
12 1200 bps packet transfer rate selected.
96 9600 bps packet transfer rate selected.

PACKET OPERATION

terminal is not used.
Function
Status
COM terminal pins
No. Name
RTS
q
w CTS
e TXD
GND
r
RXD
t
y NC
u NC
NC
i
Note:
◆ Not all functions available via conventional TNC's are supported
by the TNC built in this transceiver.
◆ The built-in TNC could be automatically reinitiated when
its malfunction is detected; this does not designate that the
transceiver is defective.
◆ To distinguish your various stations or nodes, you can have up
to 15 Secondary Station Identifiers (SSIDs); ex. W6DJY-1 to
W6DJY-15. You always have to put a dash between your callsign
and SSID number.
◆ Packet operation, easily affected by transmit and receive
conditions, requires a full-scale S-meter reading for reliable
communication. When the S-meter reads less than maximum
during 9600 bps operation, communication errors are frequent.
PACKET-1
• The COM terminal is on the rear of the
Operation panel. Connect this terminal
to a personal computer; do not
connect a computer to the PC terminal
of the TX/RX unit.
I/O Function
O Request to Send
I Clear to Send
O Transmit Data
— Ground
I Receive Data
— Non Connect
— Non Connect
— Non Connect