Work mode

TCP Server
Serial server device USR-N668 listens on the setting port and waits for a TCP client connection. The data which the serial ports sent out transparently transmit to all connected client via serial device USR-N668.

TCP client mode
The serial converter N668 initiates a TCP lint to the set IP address. If the connection fails, N668 will keep trying to reconnect until it succeeds. Once the link is successful, the data will be transparently transmitted between PC and serial device in bi-directional.

UDP mode
Serial server device USR-N668 sent the data to designated IP /Port. If the connection fails, USR-N668 will keep trying to reconnect until it succeeds. Meanwhile, USR-N668 listens the port and forwards all data received to serial device.

HTTPD Client
Support serial data transmitted to designed server in HTTPD way

Item	Parameters	Value
Hardware	Work Voltage	AC 85~265 V，50/60Hz
	Power Consumption	1.6W
	Ethernet	RJ45、10/100Mbps
	Number of Ethernet Port	2
	Serial Port Format	RJ45
	Number of Serial Port	8 Ports
	Baud Rate	300-115.2K（bps）
Software	Network Protocol	IP、TCP/UDP、ARP、ICMP、IPV4、HTTP
	IP	Static IP、DHCP
	DNS	Supports user defined
	Configuration	Software, Webpage, AT command
	Transparent transmission	TCP Server/TCP Client/UDP Server/UDP Client/ Httpd Client
	Class RFC2217	Support
	Network Cache	10Kbyte
	Serial port Cache	10Kbyte
	Average transmission delay	>=50ms
	Software	VCOM、Setup Software, Test program
	Packaging mechanism	50ms packing time, 1472 bytes packing length
Others	Certificate	CE/RoHs
	Reliability grade	EN61000-4-2(static electricity) Grade 4 EN61000-4-4(pulse group) Grade 4 EN61000-4-5(surge) Grade 3
	Shell Protection	IP30
	Size	482*185*45 MM
	Work Temp	-40～85℃
	Storage Temp	-40～105℃
	Work Humidity	5%～95% RH
	Storage Temp	5%～95% RH

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