Sierra Wireless DART 300 manual 216, 217

User’s Guide				AT Command Reference
Table 12-5: WS-Registers in CDPD Mode (continued)
Register	Description		Range	Default	Units
214	Booster Enable		0, 1	1
	The DART 300 is capable of supporting the Sierra Wireless
	AirBooster 350 RF amplifier. This register can disable the
	modem’s recognition of the amplifier for test purposes.
	Value	Meaning
	0	Disabled
	1	Enabled (Default)
216	Auto-dial on Start-up		0, 1	0
	When TCP or UDP PAD mode is used, the modem can
	initiate a client session upon power-up or reset. When
	enabled, this feature will “quick dial” the IP address and port
	stored in the Friends List at the index contained in
	+WS213 (Friend List Index).
	If the connection attempt would return a failure result code,
	the modem will retry the dial command indefinitely. No
	result codes are returned to the local host. The modem
	appears to be in data state from the power-up or reset.
	Value	Meaning
	0	Disabled (Default)
	1	Enabled
217	UDP Server Receive Lock		0 – 255	0	0.1s
	Controls the handling of packets from multiple clients when
	acting as a UDP server.

When this register is set to 0 (the default), the receive lock is disabled. The modem will only accept packets from the calling client’s IP and port until the session is closed. Packets from other callers are dropped. See Section 6.2.1.2 for a full discussion.

If the value is non-zero, the modem will accept packets from other clients but hold them based on the locking time set in this register.

The modem will queue client packets, expecting the local host to respond to each client in turn. As each response is sent, or the timer expires, the next client’s packets are delivered to the local host, up to a packet from yet another new caller. A new lock is set and the timer restarts.

Packets are delivered in the order they are received. If more than one packet arrives from a given client, those packets that arrive without intervening ones from another source will be delivered the host as a set. Only one response is needed to clear the lock and allow the next client’s packet(s) through.

If packets arrive from the currently active client while the local host has not replied, and the modem has not received packets from other clients, they will be delivered to the local host immediately. Buffering of packets begins with the first packet from a client other than the active one. From that point all packets from any client are held back (buffered) pending release of the lock.

2110212 Rev 1.0 Page 115