Javad Beacon, Руководство пользователя

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for the boot-up unit) the SAVE command must be asserted.
• [/?] orders to show the help information for the given command.
• Commands are not key sensitive; small, none capital characters can be used to enter CLI commands.
Error Code Short Description
0x01 Command Syntax Error. A command followed by “/?” displays a command usage.
0x02
The parameter has a format error. A command with the certain [Parameter Name] fol-
lowed by “/
?” displays the format and range of the variable.
0x03
The parameter is out of allowed range. A command with the certain [Parameter Name]
followed by “/?” displays the format and range of the variable.
0x04
The command is not valid for specific radio model. To display the list of available com-
mands,the HELP command must be used (see “Software Switching to Maintenance
Mode” ).
0x05 Unspecified Error
SOFTWARE SWITCHING TO MAINTENANCE MODE
To switch to Maintenance mode the special byte-sequences with special meanings are used:
• Escape-Sequence: “+++” with 20 ms guard time before and after the command characters
• Escape-Acknowledge: “@00<CR><LF>” 20 ms toggling on CTS control line needed to acknowledge switch-
ing from Data to Maintenance mode and vice versa. In Maintenance mode, the unit’s serial port must keep
CTS line always active.
Happy Flow
1. In data-mode the unit starts looking for the Escape-sequence if there is no data from DTE for
more than 20 ms (Start Guard Time).
2. If the unit detects the Escape-Sequence:
• The Receiver immediately stops forwarding to DTE the data received over the air and buffers it instead.
3. The radio unit waits for 20 ms and then sends Escape-Acknowledge to DTE if there is no data
from DTE during 20 ms of Stop Guard Time.
4. The unit goes to Maintenance mode and discards Escape-Sequence from input buffer. The modem
is immediately ready to receive commands. At the same time it continues buffering the data
received over the air since step 2.
HARDWARE SWITCHING TO MAINTENANCE MODE
As alternative to Software Switching, the switching through the MP/DP control line can be used (this
control line can be also used as Data Terminal Ready, DTR). To set Maintenance mode, the DTE must
assert DTR signal active (0v level). By falling edge of DTR signal the unit goes to Maintenance mode and
then sends Escape-Acknowledge to DTE („@00<CR><LF>“).
20 ms toggling on CTS control line followed by Escape-Acknowledge response is needed to
acknowledge switching from Data to Maintenance mode and vice versa. In Maintenance Mode, the unit’s serial
port must keep Clear to Send (CTS) line always active.
Note:
The powered up radio modem always goes to data mode.