Quatech WLNG-ET-DP500 Series - Manual (Page 19)

Quatech, Inc. Company Confidential
100-8081-100 Airborne CLI Reference Manual 19
6.3.3 PASS Mode for the Serial Interface
When the CLI Session on the serial interface attempts a transition to PASS
Mode, the CLI Server establishes an outbound connection from the Airborne™
WLN Module to a user-specified TCP server and/or UDP server on the wireless
interface. Once a connection is established, data bridging becomes possible
between the CLI Session on the serial interface and the TCP Server and/or UDP
server. If the connection to the primary TCP server failed, the CLI Server will
attempt to connect to a secondary TCP server, if configured. If the transition to
PASS Mode was triggered by the automatic startup configuration, the CLI Server
will use the
wl-retry-time configuration parameter to continuously retry
connection to the servers.
The IP addresses of the primary TCP and UDP servers are configured using wl-
tcp-ip and wl-udp-ip CLI commands. The secondary TCP server is
configured using the wl-tcp-ip2 command. The TCP server port is
configured using wl-tcp-port and wl-udp-port CLI commands. The retry
timer is configured using the
wl-retry-time CLI command. See section “CLI
Commands” for more details on these commands.
6.3.4 PASS Mode for the Wireless Interface
When the CLI Session on the wireless interface attempts to transition to PASS
Mode, the CLI Server establishes a data bridge to the CLI Session on the serial
interface if the following conditions are both true:
 The CLI Session on the serial interface is in LISTEN Mode.
 No other CLI Session on the wireless interface is in PASS Mode.
6.3.5 LISTEN Mode (Serial/UART/SPI Interface Only)
LISTEN Mode is a passive data bridging mode of the CLI Session. The LISTEN
Mode is only applicable on the serial interface. When the CLI Session on the
serial interface enters LISTEN Mode, the Airbor
ne™ WLN Module passively
waits for a data bridge to be established over the wireless interface. The data
bridge may be initiated using a CLI Session via the PASS Mode or using the
tunneling feature. The CLI Session may transition to CLI Mode using CLI Server
escape processing. See section “CLI Server Escape Processing” for details.
When the serial interface CLI Session is in LISTEN Mode, the following are
possible:
 TCP connections on the wireless interface can use the CLI commands pass,
putget or putexpect to establish a data bridge.
 TCP connection can establish a data bridge if tunneling is enabled.
6.3.6 CLI Session Startup Modes
The startup behavior of the CLI Session on each interface is determined as
follows: