Four-Faith F2303 EDGE DTU User manual

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F2303 EDGE DTU
USER MANUAL

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Xiamen Four-Faith Communication Technology Co., Ltd.
Add：J1-J2,3rd Floor,No.44,GuanRi Road,SoftWare Park,XiaMen,China 2 Zip Code：361008
Tel：[phone] Fax：[phone] http://www.four-faith.com www.fourfaith.com
C
Co on nt te en nt ts s
Chapter 1 Brief Introduction of Product.........................................................................3
1.1 General..............................................................................................................3
1.2 Product Features...............................................................................................3
1.3 System Component...........................................................................................3
1.4 Working Principle.............................................................................................3
1.5 Technical Specification ...................................................................................4
Chapter 2 Installation Introduction.................................................................................5
2.1 General..............................................................................................................5
2.2 Encasement List................................................................................................5
2.3 Installation and Cable Connection....................................................................5
2.4 Power................................................................................................................7
2.5 Indicator Lights Introduction............................................................................7
Chapter 3 Configuration.................................................................................................8
3.1 Configuration Connection ................................................................................8
3.2 Configuration....................................................................................................8
3.3 Functions ........................................................................................................18
3.4 Work State Switch...........................................................................................19
Chapter 4 Appendix......................................................................................................20

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Tel：[phone] Fax：[phone] http://www.four-faith.com www.fourfaith.com
Chapter 1 Brief Introduction of Product
1.1 General
F2303 EDGE DTU is based on public EDGE network, and it provides customers
with high speed, “always online”, transparent data transfer channel. It has been widely
used on finance, electric power, environment protection, transportation fields and so
on.It also supportsAPN to meet the need of customers.
1.2 Product Features
Industrial MCU, 100M
Design with standard TCP/IP protocol stack
Adopt smart online keeping technology to make sure that DTU is always
online.
Support double data centers, one main and another backup
Support multi data centers, It can support 5 data centers at the same time
Support dynamic domain name(DDNS) and IP access to data center
Support several work modes
Support hardware and software WDT
Easy to upgrade firmware
Support remote configure and control
Support RS232/RS485
Power range: DC 5~35V
1.3 System Component
The DTU is composed of the following parts mainly:
Industrial MCU, 100M
256KB Sram & 512KB Flash
Industrial EDGE module
1.4 Working Principle
The principle chart of the DTU is as following:
Embedded processing
s
y
stem
EDGE Module
Power RS232 serial
Interface Indicator lights
DATA Interface
User interface
RS485 serial
Interface

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1.5 Technical Specification
Wireless specification:
GSM850/900/1800/1900MHz
Multi-slot class 10
Compliant to GSM phase 2/2+
Support SMS and data function
Interface:
RS232/485 serial port, rates: 110~230400bits/s
Indicator lights: “Power”, “ACT”, “Online”
Antenna interface: standard SMA female interface, 50 ohm
SIM/UIM interface: standard user card interface
Power interface: standard 3-PIN power jack
Power supply:
Standard power: DC 12V/0.5A
Power range: DC 5~35V
Others:
Operation temperature:-25~+65ºC
Storage temperature: -40~+85ºC
Humidity: 95% (unfreezing)

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Chapter 2 Installation Introduction
2.1 General
The DTU must be installed correctly to make it work properly.
Warning: Forbid to install the DTU when powered!
2.2 Encasement List
Name Quantity Remark
DTU host 1
Antenna 1
Power adapter 1
RS232 data cable 1 optional
RS485 data cable 1 optional
Manual CD 1
Certification card 1
Maintenance card 1
2.3 Installation and Cable Connection
Dimension: (unit: mm)
58.5
35
28
28
22 8
25
Ф3
Ф5
4
Installation of SIM/UIM card:
Firstly power off the DTU, and press the out button of the SIM/UIM card outlet
with a needle object. Then the SIM/UIM card sheath will flick out at once. Put
SIM/UIM card into the card sheath (Pay attention to put the side which has metal point

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outside), and insert card sheath back to the SIM/UIM card outlet.
Warning: Forbid to install SIM/UIM card when powered!
Installation of antenna:
Screw the SMA male pin of the antenna to the female SMA outlet of the DTU
tightly. Warning: The antenna must be screwed tightly, or the singal quality of antenna
will be influenced!
Installation of cable:
Insert DB9F end of the RS232/RS485 data cable into the DB9M interface of DTU,
and connect the other end with user’s device.
The signal connection of the RS232 data cable is as follows:
The signal connection of the RS485 data cable is as follows:
DB9FDB9F
RS232 data cable
1
RXD 2
TXD 3
4
GND 5
6
7
8
9
1
2 RXD
3 TXD
4
5GND
6
7
8
9
DB9F
RS485 data cable
1
2
3
4
5
A 6
7
8
B 9
A (RED)
B (BLACK)

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2.4 Power
The power range of the DTU is DC 5~35V.
Warning: When we use other power, we should make sure that the power can
supply power above 4W.
We recommend user to use the standard DC 12V/0.5A power adaptor.
2.5 Indicator Lights Introduction
The DTU provides three indicator lights: “Power”, “ACT”, “Online”.
Indicator
Light
State Introduction
Power Bright DTU is powered on
Dark DTU is powered off
ACT Twinkle Data is communicating
Dark No data
Online Bright DTU has logged on network
Dark DTU hasn’t logged on network

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Chapter 3 Configuration
3.1 Configuration Connection
Before configuration, It’s necessary to connect the DTU with the configure PC by
the shipped RS232 or RS232-485 conversion cable as following.
3.2 Configuration
There are two ways to configure the DTU:
Configuration software tool: All the settings are configured through the shipped
software tool. It’s necessary to have one PC to run this tool.
Extended AT command: All the settings are configured through AT command, so
any device with serial port can configure it. Before configuration with extended AT
command, you should make DTU enter configure state. The steps how to make DTU
enter configure state, please refer to appendix.
The following describes how to configure DTU with the configure software tool. At
the same time, it gives out the correspondingAT command of each configuration item.
3.2.1 Run the configure Tool FfDtuCfgTool-En.exe
The “Serial Parameters” column shows the current serial port settings. To configure
DTU, please choose the correct serial port which connects to DTU, and the baudrate is
115200 with no parity, then open the serial port. If the button text is “Close”, it shows
the serial port now has been opened. If the text is “Open”, you should open the port
first. When the port opened, the “Output Info” column will display
“Port(COM1) Has Opened，Please Re-Power the DTU,
Waitting DTU Enter Configure State...”

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3.2.2 Re-power DTU
After Re-power DTU, The configure tool will make it enter configure state. At the
same time, the software will load current settings from DTU and displays on the right
configure columns. It’s now ready to configure.
3.2.3 Start Configuration
3.2.3.1 Data Service Center Settings
Settings on this page are the parameters related to Data Service Center(DSC).
◆Data Center Number
DTU support two Data Service Center methods to transmit data.
Main and Backup: DTU always tries to connect with the Main DSC. If fails to
connect with Main DSC, it will connect with Backup DSC at once
Note：If no Backup DSC exists, please configure the Backup DSC same as Main
DSC.
Multi Data Service Center: DTU can connect with at most five DSC at the same
time.All the multi DSC can receive the same application data .
If the Data Center Number is 1, DTU work in Main and Backup DSC method.
When “Data Center Number” is greater than 1, DTU works in Multi Data Service
Center method
AT command:
AT+SVRCNT=x
x: Data Service Center number
Note: every AT command is terminated with a enter character.
◆Main Center Addr+Port:
IPAddress and Port of the Main DSC, It’s better to set the port greater than 1024.

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AT command of the Main DSC IP address or domain name:
AT+IPAD=xxx
xxx: The IP address or domain name.
AT command of the Main DSC port:
AT+PORT=xxx
xxx: The port value
◆Backup Center Addr+Port:
IP address and port of the Backup DSC
AT command of the Backup DSC IP address or domain
AT+IPSEC=xxx
xxx: The IP address or domain name
AT command of the Backup DSC port
AT+PTSEC=xxx
xxx: The port value
◆Multi DSC Configuration
When “Data Center Number” is greater than 1, this setting is valid. For example，
setting the “Data Center Number” as 3, Main Center, 2nd Center, 3rd Center work as
these three DSC
AT Command of the 2~5 DSC IP address or domain name
AT+IPADn=xxx
n is 1~4 correspond to center 2~5
xxx: The IP address or domain name
AT Command of the 2~5 DSC port
AT+PORTn=xxx
n is 1~4 correspond to port of center 2~5
xxx: The port value
Example:
Set IP address of center 3 as 166.111.8.238, and port 5001, the AT command is as
following:
AT+IPAD2=166.111.8.238
AT+PORT2=5001
◆Main and Backup Center DNS Server
When the DSC Internet access uses domain name, It’s necessary to set DNS server
resolving the DSC domain name. When the Data Center Number is 1, Main and

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Backup Center DNS Server is used to resolve the Main center and Backup center
correspondingly.
AT command of Main Center DNS server:
AT+DNSSVR=aaa.bbb.ccc.ddd
aaa.bbb.ccc.ddd: The DNS server IP address(must be IP address）.
AT command of Backup Center DNS server:
AT+DNSSV2=aaa.bbb.ccc.ddd
aaa.bbb.ccc.ddd: the DNS server IP address
◆Center 2~5 DNS Server
When the DTU 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
3.2.3.2 DTU Settings
◆DTU 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：DTU work as a common EDGE MODEM, It can be used in SMS, CSD,
Dial-up applications.
TTRN：Heartbeat packet with UDP protocol, Data transmission with TCP protocol
TLNT：DTU work as a telnet client
LONG：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.
TUDP：Heartbeat with UDP protocol, Data transmission with UDP protocol, Heartbeat
packet and application data are in the same UDP connection.

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TCST：User can set custom register and heartbeat string, Data transmission with TCP
protocol.
AT command:
AT+MODE=xxxx
xxxx: one of the above workmode
◆Trigger Type
Normally, DTU always keeps online and always be ready for data transmission. But
in some circumstances, it’s important to reduce wireless data flow. To realize this
function, the software can makes DTU into sleep state in idle time. When there is
application data to transmit, DTU can be triggered online ready for data transmission.
There are total five methods to make DTU online:
AUTO: DTU always keeps online
SMSD: send a special short message to make DTU online
CTRL: make DTU online through a phone call to DTU
DATA: send special serial data to make DTU online
MIXD: the combination of SMSD, CTRL, DATA. DTU will be online when meet one
of these three trigger methods.
AT Command:
AT+ACTI=xxxx
xxxx: one of the above trigger methods
◆Debug Level
Debug information is used to debug software when there is software problem.
0 --- no debug information output
1 --- simple prompt information output
2 --- detail debug information output
AT Command:
AT+DEBUG=x
x : the debug level value
Note: Only there is some problem to the DTU, It’s necessary to set this value as 2,
In normal applications, this value should set to 0 or 1, the default value is 1.
◆Databit, Parity, Stopbit

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8N1 --- 8 Databit, No parity, 1 Stopbit
8E1 --- 8 Databit, Even parity, 1 Stopbit
8O1 --- 8 Databit, Odd parity, 1 Stopbit
AT Command:
AT+SERMODE=xxx
xxx: one of the above serial mode
◆Communication Baudrate
110 ---110bps
300 --- 300 bps
600 --- 600 bps
1200 --- 1200 bps
2400 --- 2400 bps
4800 --- 4800 bps
9600 --- 9600 bps
14400 --- 14400 bps
19200 --- 19200 bps
38400 --- 38400 bps
56000 --- 56000 bps
57600 --- 57600 bps
115200 --- 115200 bps
AT Command:
AT+IPR=xxx
xxx : one of the above baudrate
◆Auto Back To Main Server
0 --- No
1 ---Yes
This item is only valid when you set “Data Center Number” as 1. In this mode, DTU
will switch to backup center when main center have problems. If this item is set to 1 ,
DTU will check whether the main center work fine timely. When it detects the main
server work fine, it will return back to the main server at once.
AT Command:
AT+RETMAIN=x
x : 0 or 1
◆Device ID

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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.

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AT Command:
AT+LINKRGST=xxx
xxx：self defined heartbeat string
◆Connect Retry Times, Reconnect Time Interval
In normal applications, DTU will always try to connect with the center even if the
center has problems or closed. To reduce these unnecessary wireless data flow, you can
configure the “Connect Retry Times” and “Reconnect Time Interval” items. When
DTU fail to connect to the center with the configured Retry Time, It will sleep
“Reconnect Time Interval” time, then start next retry.
“Connect Retry Times”AT Command:
AT+RETRY=xxx
xxx：times try to connect to the center
“Reconnect Time Interval” AT Command:
AT+RDLWT=xxx
xxx: the sleep time until next retry.
◆Transfer meanning
0 --- Yes, enable transfer meaning
1 --- No, disable transfer meaning
This item is only valid when the WorkMode is PROT. If this item is set to 0, DTU
will transfer meaning to 0xfd and 0xfe. To know detail transfer meaning method,
please refer <<DTU Transfer Meaning Explanation In the PROT work mode>>. If this
item is set to 1, all the transmission is transparent.
AT Command:
AT+STRAIGHT=x
x：0 or 1
3.2.3.2 Other Settings
◆Network

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APN: access point name.
Username: username to login the ISP network.
Password: password to login the ISP network
Call Center: the call center phone number
AT Command of APN:
AT+APN=xxxx
xxxx: access point name
AT Command of Username:
AT+USERNAME=xxx
xxx：username
AT Command of Password:
AT+PASSWORD=xxx
xxx：password
AT Command of Call Center:
AT+CENT=xxx
xxx: call center phone number of ISP
◆SMS Center
Your local SMS center number
AT Command:
AT+SMSC=xxx
xxx: your local SMS center number
◆Heartbeat Interval
Time interval sent heartbeat packet. (unit is second)
AT Command:
AT+POLLTIME=xxx
xxx: heartbeat packet time interval
◆Call Trigger Phone No
This item is only valid when the “Trigger Type” is CTRL or MIXD. In this trigger
type, DTU will keeps in idle state until it receives the trigger phone call, then it will

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connect to the center.
AT Command:
AT+CTRLNO=xxx
xxx : trigger phone number
◆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

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after the configured reconnect interval
AT Command:
AT+MCONTIME=xxx
xxx : reconnect time interval (unit is second)
3.3 Functions
◆Clear Output
Clear the output information
◆Version Display
Show the software and hardware version
◆Signal Value
Display current wireless signal value
◆Factory setting
Restore to factory settings
◆Show Config
Show current DTU settings
◆Show Baudrate
Display the communication baudrate
◆Auto Detect
Simple way to determine whether DTU work fine
◆Save Output
Save the output info to a file
◆Save Config
Save the current settings to a file, you can restore it from this file later
◆Restore Config
Restore settings from a previous saved configure file

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3.4 Work State Switch
This tool can work in two states, “Config” and “Communication”
Config:
This state is used to configure parameters of DTU.
Communication:
This state is used as a common serial communication tool
Reboot Device, Enter Communication State:
This function button is used to reboot DTU and make the software switch to
Communication state

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Chapter 4 Appendix
The following steps decribe how to make DTU enter configure state with the
Windows XP Hyper Terminal.
1. Press “Start”Æ”Programs”Æ”Accessories”Æ”Communications”Æ”Hyper
Terminal”
2. Input connection name, choose “OK”
3. Choose the correct COM port which connect to DTU, choose “OK”
4. Configure the serial port parameters as following, choose “OK”
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None