Yifan M240 Series, Руководство пользователя

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User Manual
Yifan Industry Co., Ltd.
Page 19 of 41
Tel: +86 592 5222813 Fax:+86 592 6101492
Email: admin@yifanwireless.com , admin@yi-fan.com.cn
Website: www.yifanwireless.com
AT+DNSSV2=aaa.bbb.ccc.ddd
aaa.bbb.ccc.ddd: the DNS server IP address
◆
Center 2~5 DNS Server
When the IP MODEM work in Multi Data Service Center method and the centers use domain
name, 2~5 DNS server is used to resolve center 2~5 correspondingly.
AT command of 2~5 DNS Server
AT+DNSSVRn=aaa.bbb.ccc.ddd
n is 1~4 correspond to center 2~5 DNS server.
aaa.bbb.ccc.ddd is the DNS server IP address
3.5.2 IP MODEM Settings
◆
IP MODEM WorkkMode
According to different application requirements, there are several protocol workmode to choose.
PROT
：
Heartbeat packet with TCP protocol, Data transmission with TCP protocol, heartbeat
packet and application data transmission are in the same TCP connection.
TRNS
：
IP MODEM work as a common GPRS MODEM, It can be used in SMS, CSD, Dial-up
applications.
TTRN
：
Heartbeat packet with UDP protocol, Data transmission with TCP protocol
TLNT
：
IP MODEM work as a telnet client
LON
G ：
Heartbeat packet with UDP protocol, Data transmission with TCP protocol, It can transmit
at most 8192 bytes data one time through extra application protocol.
LNGT
：
Heartbeat with UDP protocol, Data transmission with TCP protocol, It can transmit at
most 8192 bytes data one time through extra application protocol.
TUD
P ：
Heartbeat with UDP protocol, Data transmission with UDP protocol, Heartbeat packet and
application data are in the same UDP connection.
TCST
：
User can set custom register and heartbeat string, Data transmission with TCP protocol.
AT command:
AT+MODE=xxxx