Lantronix 900-618 manual Datagram Type, Modem Mode, Directed UDP

7: Setup Mode: Channel Configuration

d) Datagram Type

Directed UDP

When selecting this option, you are prompted for the Datagram type. Enter 01 for directed or broadcast UDP. Datagrams of type 01 can be sent as a broadcast by enabling the Send as Broadcast option. The default is not to broadcast.

When the UDP option is in effect, the unit never attempts to initiate a TCP connection because it uses UDP datagrams to send and receive data.

e) Modem Mode

In Modem (Emulation) Mode, the unit presents a modem interface to the attached serial device. It accepts AT-style modem commands and handles the modem signals correctly.

Normally, there is a modem connected to a local PC and a modem connected to a remote machine. A user must dial from the local PC to the remote machine, accumulating phone charges for each connection. Modem Mode allows you to replace modems with xPicos, and to use an Ethernet connection instead of a phone call. By not having to change communications applications, you avoid potentially expensive phone calls.

To select Modem Mode, set the Connect Mode to C6 (no echo), D6 (echo with full verbose), D7 (echo with numeric response), CF (modem responses only, numeric response), or CE (modem responses only, full verbose).

Note: If the unit is in Modem Mode, and the serial port is idle, the unit can still accept network TCP connections to the serial port if Connect Mode is set to C6 (no echo), D6 (echo with full verbose), D7 (echo with numeric response, CF (modem responses only, numeric response), or CE (modem responses only, full verbose).

Without Echo	In Modem Mode, echo refers to the echo of all of the characters
	entered in command mode; it does not mean to echo data that is
	transferred. Quiet Mode (without echo) refers to the modem not
	sending an answer to the commands received (or displaying what
	was typed).
Data Echo & Modem	Full Verbose: The unit echoes modem commands and responds to
Response	a command with a message string shown in the table below.
	Numeric Response: The unit echoes modem commands and
	responds to a command with a numeric response.
Modem Responses	Full Verbose: The unit does not echo modem commands and
Only	responds to a command with a message string shown in the table
	below.
	Numeric Response: The unit does not echo modem commands
	and responds to a command with a numeric response.
Table 7-7. Modem Mode Messages
Message	Meaning
Full Verbose
OK	Command was executed without error.
CONNECT	A network connection has been established.
NO CARRIER	A network connection has been closed.
RING n.n.n.n.	A remote device, having IP address n.n.n.n, is connecting to this
	device.

xPico User Guide 47