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Command Line Interface
Command Line Interface Convention
Hardware Switching to Maintenance Mode
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3.1.2. 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 (see also “MPORT” on
page 28).
Note:
The powered up radio modem by default goes to Data Mode regardless of DTR control line
polarity.
3.1.3. Switching to Data Mode
• DTE sends the CLI command „DATAMODE<CR><LF>“to the unit.
• Unit answers with Escape-Acknowledge („@00<CR><LF>“) and immediately goes to
datamode, so that the DTE can start sending data as soon as the Escape-Acknowledge has
been received.
• If no valid CLI commands received from DTE within 1 minute, the unit will automatically
switch back to data-mode.
Note:
The data received over the air could be lost due to Rx buffer overflow if the unit stays in
Maintenance mode longer then 15 second.