Hardware Switching To Maintenance Mode; Switching To Data Mode; Networking Commands; Link - Javad HPT404BT Operator's Manual

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 36).
Note:
The powered up radio modem always goes to data mode.

1.3. Switching to Data Mode

• DTE sends the CLI command „DATAMODE<CR><LF>"to the unit.
• Unit immediately goes to data mode without Escape Acknowledge.
• 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 than 15 seconds.

2. Networking Commands

2.1. LINK

The LINK command is responsible for configuring radio's operation mode. It has parameters listed
below.
LINK [Parameter Name] [Parameters List] [/?]
www.javad.com
Command Line Interface
Networking Commands
33