Chengdu Ebyte Electronic Technology Co., Ltd. NB144E User ManualCopyright ©2012,Chengdu Ebyte Electronic Technology Co., Ltd. 164 Functions4.1 Correspondence between channel and serial portBaud rate: 2 400 , 4 800 , 9 600 , 1 4400 , 1 9200 , 3 8400 , 5 7600 , 7 6800 , 1 15200bps ;Data bits: only 8 bits are supported;Parity bit: support no parity (N ONE ), odd parity (O DD ), even parity (E VEN );Hardware flow control: not supported;Channel Serial Port indicatorlight serial protocol Factory port, modechannel 1 COM 1 P ORT1 RS485 , RS232 , RS422 8 001 , TCPSchannel 2 COM 2 P ORT2 RS485 , RS232 , RS422 8 002 , TCPSchannel 3 COM 3 P ORT3 RS485 , RS232 , RS422 8 003 , TCPSchannel 4 COM 4 P ORT4 RS485 , RS232 , RS422 8 004 , TCPS4.2 Local network parameters4.2.1 Local IPSTATIC (static IP ) : users can define configuration IP , subnet mask, default gateway, domain name resolutionserver (D NS server);DHCP (dynamic IP acquisition): The device logs in to the server to automatically obtain the IP address, subnetmask, gateway address, and DNS server address parameters assigned by the server and configure them for use;4.2.2 DNS ( domain name resolution )When the user enters the domain name, the DNS server will be automatically queried, and theDNS server will retrieve the database to obtain the corresponding IP address. In the static IP mode ,the user can customize the domain name resolution server to resolve private domain name serverdata . In this mode, the device automatically follows the domain name resolution server configuredby the routing device, and the user only needs to modify the DNS server of the routing devicewithout configuring the device.