User's Manual Part 6


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  
'&.$)4
Messages may be sent to the DTE by the radio as part of a transaction (i.e. in response to
a command issued by the DTE) or unsolicited. In the case of solicited commands, the
prompt character will be issued after the RU response to terminate the transaction and
signify that another may begin.
 In the case of solicited commands, the prompt character, “
•
”, will be issued after the
RU response, to terminate the transaction and signify that another may begin.
Unsolicited commands from the RU will not cause the issuing of the prompt
character, as it is possible for an unsolicited command (e.g. Receive) to occur
during a solicited command (e.g. Transmit).
The following Table describes messages from the RU to the DTE.
Command Description
Message
Comments
[IDENT]
[PARAMETERS]
Receive
Unsolicited.
This presents data
received by the RU
to the DTE. The data
received by the RU
has been broadcast
by another RU/DTE,
using the Transmit
command.
i The data received is encoded as
binary data. Note that this field
may contain unprintable ASCII
characters (such as CR/LF) and
protocol command characters
(such as ‘
•
’).
Query
Response
Solicited
The RU’s response to
a Query command.
m[RU TYPE]
A single character,
representing the
model of the RU.
0 = unknown
3 = T2010
4 = T2015
1
The value of
[PVER-
SION] = 1.01
is reserved
for the first release of
firmware implementing
this command protocol.
Subsequent enhance-
ments and major
upgrades will incre-
ment this number
accordingly.
2
Additional fields may be
added to this message in
future releases to pro-
vide more information
about the RU environ-
ment. In particular, it
may be necessary to
pass the DTE some
information on how the
RU has been pro-
grammed, or what
optional hardware is fit-
ted.
[VERSION]
Firmware version. A
character string, in
the format of X.XX,
identifying the
capabilities of the
RU/modem.
[PVERSION]
Protocol Version. A
character string, in
the format of X.XX,
identifying the com-
mand protocol ver-
sion supported.
[NUM
CHANNELS]
The number of
channels supported
by the Go To Chan-
nel command. A 3
digit ASCII number.
Ready
“
•
”
This response indi-
cates that a transac-
tion has been
completed, and the
RU is ready for the
next command.
None
None After issuing a command,
the DTE must wait for
another prompt before
beginning the next transac-
tion.
Continued on next page