厦 门 四 信 通 信 科 技 有 限 公 司
Xiamen Four-Faith Communication Technology Co., Ltd.
Add：J1-J2,3rd Floor,No.44,GuanRi Road,SoftWare Park,XiaMen,China
17
Zip Code
：
361008
Tel：+86 592-6300320, +86 592-6300321, +86 592-6300322 Fax：+86 592-5912735 http://
www.four-faith.com www.fourfaith.com
connect to the center.
AT Command:
AT+CTRLNO=xxx
xxx : trigger phone number
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SMS Trigger Password
This item is valid only when the “Trigger Type” is SMSD or MIXD, DTU will
keeps in idle state until it receives the trigger short message, Then it will connect to the
center.
AT Command:
AT+SMSDPSWD=xxx
xxx : SMS content to trigger DTU online
◆
Data Trigger Password
This item is valid only when the “Trigger Type” is DATA or MIXD, DTU will keeps
in idle state until it receives the trigger on data, then it will connect to the center, It will
return to the idle state when receives trigger off data.
AT Command of Data Trigger On Password:
AT+DONPSWD=xxx
xxx : data trigger on password
AT Command of data trigger off password:
AT+DOFFPSWD=xxx
xxx :data trigger off password
◆
TCP MTU
The maximum transmission unit of TCP packet
AT Command:
AT+TCPMTU=xxx
xxx : the MTU value
◆
Multi Center Reconnect Interval
This item is valid only when the “Data Center Number” is greater than 1.
When one of the configured data center lost connection, DTU will try to reconnect
