Host mode programs simply include the raw binary data in the data stream; how
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ever, if you are using a standard telephone communications program, it is possi
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ble to allow the KAM’98 to send raw binary data. To do this, once you are linked
to another station in G-TOR, type the <Ctrl+C>B directive. This places the
KAM’98 in a data transparent mode, allowing ALL characters to be transmitted
from the computer.
CAUTION: When you have done this, no special characters are recognized by the
KAM’98, and no directives are available. Thus, typing <Ctrl+C> E, for instance,
will NOT cause a changover; it will simply transmit the <Ctrl+C> character and
the E to the other station. To exit this data transparency mode, you MUST send a
modem break signal. Most telephone communications programs support this fea
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ture. (Procomm Plus, for instance, sends a modem break when you press Alt-B.)
If your communications program does not support the modem break, you will not
be able to leave the data transparency mode.
The KAM’98 will automatically exit data transparency if the other station dis-
connects from you, or at any time your KAM’98 leaves the linked state (due to
errors or retries).
Summary of GTOR Directives
<Ctrl+C>A Abort a link or abort an attempt to link
after the first invalid response code.
<Ctrl+C>B Enter data transparency mode
(for binary file transfer)
<Ctrl+C>D Disconnect from the station you are
linked to. A changeover will be performed
if required, and the KAM’98 will return
to GTOR Standby mode.
<Ctrl+C>E (ARQ mode)Changeover from ISS to IRS when
all pending data has been transmitted.
(FEC mode—AMTOR FEC)Return to receive
when transmit buffer is empty
(used when calling CQ).
Non-Packet Modes of Communication G-TOR Mode
User’s Guide 132 KAM’98 v 8.3
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