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wireless Modem
wireless Modem
Supplier Info
[China Supplier]
Contact Person : Ms. Dou Alina
Tel : 86-755-88864288-8236
Fax : 86-755-83404677
Product Detail
Wireless Modem:Built-in watchdog, cprovide reliable, economical communication services at anywher and anytime with high quality

Wireless Modem

H6x21 wireless Modem is designed for industrial applications based on 2.5G/2.75G mobile network. It is developed at platform infrastructure with modular options. On the basis of many years mobile communication experiences and industrial application requirements, it is integrated with watchdog circuit and link detecting function. Co-working with Hongdian dialup software, H6x21 modemcan detect radio channel and modem operation status itself. If the link dropped or hardware failed, H6x21 modem will redial or reset automatically. With this advanced function, customers can have reliable, flexible, economical data communication services at anywhere and anytime.

H6821 Series CDMA 1x Modem Functions

1) Basic Functions

Support 800/1900MHz dual bandEase to use, reliable and flexibleComplied with FCC/SAR and CDG 1/2&3 standardAlways online and operation mode selectionReal clock

2) Enhanced Functions

Watch dog design, ensure modem alive GPRS link detection and redial (work with Hongdian dialup software) Support dial up control Send SMS via PC Support RS-232 interface

3) Special Functions

Power control    On/Off via interface connector    User can control Modem operation of PIN-Off power on, PIN-GND power off    Save power

Built-in RF module supervision    Built-in RF module status detection    Reset RF module when it out of service

Reset outlet    Ground the reset PIN 500ms restart modem

Serial Port Reset    Reset MODEM via RS-232 control PIN    Save the I/O resources    No interrupt with data communication    Only few source code program to controlH6821 Series CDMA 1x Modem Specifications1) Voice

Voice and Emergence Call Support QCELP 13k voice codingEcho canceller and noise suppression (option) Support DTMF signaling

2) CDMA1x data

Support IS 707 data serviceSupport 153kbps packet dataSupport Class 2.0 Group 3 facsimileCDMA 2000 spread spectrum

Complied with IS-95A, IS-95B CDMA interface3) Interface

Antenna: 50ohm/SMA/Female

UIM card: 3V

Data interface:RS-232

Voice: Ear/Microphone

4) Operation System

Windows 9x/NT/2000/XP


5) Power Supply


6) Power consumptions:     Max. current: 350mA@+5VDC     Idle:  25mA@+5VDC7) Others

Mechanical    98x100x23 (not include antenna)

Weight: 150g

Operation temperature: -5~+40ºC

Related humidity: 95%(non-condensing)  

Ordering Information

H6821 CDMA 1x modem has been used at many circumstances. Considering the application environment, customers can order different modules and accessories in accordance with their requirements. There are following models which can be selected.






USB Interface, Wavecom module inside, 800 Single band, 800/1900Mhz Dual band optional. 


RS-232 Interface, ZTE module inside, 900/1800Mhz Dual band.  Either +5VDC or  +7.5~26VDC. 


RS-232 Interface, Wavecom module inside, 800 Single band.  Either +5VDC or  +7.5~26VDC. 


RS-232 Interface, Wavecom module inside, 800/1900 Dual band.  Either +5VDC or  +7.5~26VDC. 

Above modules can be designed in accordance with customer's specifications. OEM is also welcome.

wireless Modem

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