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
14
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
The identity number of DTU, the value should be 8 bytes hex-decimal characters.
AT Command:
AT+IDNT=aabbccdd
aabbccdd: the identity number of DTU
◆
SIM Card No
The phone number of the SIM card .
AT Command:
AT+PHON=xxxxxxxxxx
xxxxxxxxxxx: the SIM card phone number
◆
Bytes Interval
The time interval used to determine whether the serial data frame transmission has
completed, DTU will send the serial data to the center when two bytes transmit time
interval larger than this item value.
AT Command:
AT+BYTEINT=xxx
xxx: bytes interval time value
（
millisecond
）
◆
Custom Register String
This item is only valid when the WorkMode is TCST. It’s the self defined register
string. It can be empty, the maximum length is 70 bytes.
AT Command:
AT+CONNRGST=xxx
xxx
：
self defined register string
◆
Custom Heartbeat String
This item is only valid when the WorkMode is TCST. It’s the self defined heartbeat
string, It can be empty, the maximum length is 70 bytes.
