GE TransNET 900 Reference Manual page 68

connections where wire lines were the only communications link available at
the time. Most of these older system implemented support for the AT
commands needed in the host software, so TransNET units can be used
without software modifications.
In this mode, the Master's
(See Supported Commands below). When an
detected, and
xxxxx
Master will establish a virtual link to that unit. It will remain in that state until
either another
ATDT xxxxx
Unaddressed Remotes in the network will not respond to user data. Data will
only be exchanged between the equipment connected to the addressed
Remote unit and the network or device connected to the Master's
In order to use this mode, the command
Radio. The acknowledgment to an ATDT command is simulated by the
Master; there is no true verification that the far-end connection is valid.
Please consider the following additional information before using the AT
commands:
• Radio commands and AT commands are independent with unique
syntax and functional objectives.
• is not a radio command; it is part of the payload data input and
ATDT
follows the syntax for Hayes-compatible modems.
• TransNET commands are entered through the RJ11
on Master and Remote radios.
TransNET commands.
• AT commands are only entered through the Master's DB-9
and only when the TransNET command
issued. The radio supports a subset of the Hayes-compatible modem AT
set. Each command is entered without spaces, and always begins with
, and ends with a carriage return key press.
AT
Supported AT Commands
Supported modem commands on the payload port are:
AT <attention>
Replies with
OK
ATDT [xxxxx] <dial>
The command
if applicable. This command replies with
connected, all characters are passed through until a
ATH <hang up> or +++
This command replies with
to the currently addressed Remote station.
ATV[x] <change verbosity>
, means use numeric messages
x = 0
, means use text messages (Default)
x = 1
Replies with
OK
56 MDS TransNET Ref. Manual
DATA
port is parsed for a subset of AT commands.
is a unit address of a radio in the network, the TransNET
or (hang-up/disconnect) is detected. (Note:
ATH
(Code 0).
represents 5-digit unit address with a leading zero (0)
xxxxx
(Code 0) and deletes any virtual connection
OK
(Code 0)
ATDT xxxxx
must be selected at the Master
AT ON
and are examples of
AT ON
UNIT
has been previously
AT ON
CONNECT
MDS 05-2708A01, Rev. F
data sequence is
DATA
DIAGNOSTIC
DATA
(Code 1). Once
is seen.
+++
port.
port
port,