F8X14 Series User Manual
◆
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 WorkMode
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.
TCST
：
User can set custom register and heartbeat string, Data transmission with TCP protocol.
TCPSVR
：
No heartbeat packet or register packet in the same TCP connection.
SUD
P：
User can set custom register and heartbeat string, Data transmission with UDP protocol,
Heartbeat packet and application data are in the same UDP connection.
PUDP
：
No heartbeat packet or register packet in the same UDP connection.
AT command:
AT+MODE=xxxx
xxxx: one of the above workmode
Summary of Contents for F8 14 Series
Page 4: ...F8X14 Series User Manual ...
