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1. CDMA Modem General
H7708/H7709 CDMA1x DTU is a data termination unit based on CDMA1x mobile network. It provides data communication network for industrial applications. With the reliable, flexible and cost-effectiveness features, it can be utilized at many areas to provide the M2M communication channels by wireless DDN.
H7708/H7709 CDMA1x DTU is a public-platform-based and embedded wireless DDN Data Termination Unit (DTU) which is designed from highly industrial automatization integration and compatibility of market application. It provides differential requirement from different fields, users and applications. Embedded with TCP/UDP protocol, industrial design with 20-pin sockets, it converts the user data into CDMA network and transmits the data into the customers data service center while its embedded in terminals which can provide mobility. H7708/H7709 CDMA1x DTU is embedded with user terminals without casing as of further embedded than normal .With the professional designing, H7708/H7709 CDMA1x DTU provides the plug and play, easy to use and maintenance features.
Hongdian Data Termination Units (DTU) have been widely used for many application areas in the world, such as electric power, oil field, coal mine safety, weather forecast, environment protection, hydrology, heating pipe line, gas pipe line, street lamp control, telecommunications, post, bank and many other areas.
DTU - Data Termination Unit, it is Hongdian registered trade mark.
DDP - DTU/DSC Protocol, it is the data transmission protocol between DTU and data service center. it is Hongdian registered trade mark.
TDP- Terminal/DTU Protocol, it is the data transmission protocol between DTU and user terminal. it is Hongdian registered trade mark.2. Hongdian H7708/H7709 DTU Features
1) Basic functions
Embedded PPP, TCP/IP stack
Transparent data conversion and protocol transmission
Supports static data service center IP address
Supports DNS and dynamic data service center IP address
Supports CDMA data channel and SMS backup
Supports peer to peer, center to multi-point data transmission
Support Carrier public & special APN
Supports Xmodem protocol and firmware updating
Optimized EMC design
Wide range power input
Smart power management
Power on/off control
Industrial class pluggable terminal block
Standard antenna and R-UIM interface
Reliable, flexible, easy to use and management
Embedded PPP, TCP/IP stack2) Enhanced functions
Industrial design for different application environments
Industrial class components,Industrial class CDMA wireless module, Embedded RTOS
Modularization design with super spread
Separated design between CPU and wireless module;
Flexible to support different networks, easy to spread;
Built-in multiple communication protocols PPP, TCP/IP, UDP/IP
Hongdian DDP protocol, ensuring the data channel reliability
Hongdian ADP and AT+ protocol, satisfying the customized applications
Multiple operation model
Always online: automatic online while it powered on, automatic redial and keep-alive while the line dropped;
Data trigged online; Ring and SMS trigged online;
Online control interface with the connected device;
CDMA data and SMS backup and switch;
Data loop testing
Multiple data service center communications
Supports up to 4 data service center communication Supports main/backup data service center communication
Supports customized setting for each data service center
Flexible data communication
Supports TCP/IP Server/Client, UDP/IP, DDP, SMS, AT
Self-define transparent or protocol communication
Self-define last packet idle interval and MTU
Self-define customized data frame separator
Self-define re-connecting interval
Self-define online report interval
Self-define heart-beating data frame
Parameters configuration and remote management
Built-in Chinese or English configuration tool
PC based configuration tool
Remote configuration via data service center
Remote configuration by SMS
TDP protocol parameter configuration
Configuration via AT+ command
Full function data service center development kits
Full function development package
Complete set of Chinese and English version demo source code (VB, VC, C#, Delphi)
Complete function data service center software for transparent data transmission
Powerful data service center testing tool
Integrated with HMI/MMI/SCADA software (for Chinese market only)3. Hongdian H7708/H7709 DTU Specifications1) Data
Support CDMA1x
Support 800Mhz,(450Mhz or 800/1900Mhz are optional)
Support IS 707 data service
Support Class 2.0 Group 3 facsimile
CDMA 2000 spread spectrum
Complied with IS-95A, IS-95B CDMA interface2) Interface
Antenna: 50/SMA-K Female
R-UIM: 3V
Serial data interface
Type: TTL/RS-232/RS-422/RS-485
Rate: 300~115200bps
Connector: 3.5mm pluggable terminal block (14~24AWG)
Configuration interface: RS-232 (57600bps)
Voice interface: Standard voice level input/output
3) Power
Voltage: +7.5~+26VDC (+5VDC optional)
Consumption: Average working current:25mA/+12VDC
4) Others
Mechanical:H7709 (96x60x30 )mm (not including antenna)
H7708 (85x40x30 )mm (not including antenna)
Weight: H7709(180g) H7708(120g)
Operation temperature:-20~+55ºC
Store temperature:-40~+85ºC
Related humidity:95%( non-condensing)
H7709 CDMA Modem (DTU)