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SPECIFICATION
FAQ | | H6821 CDMA industrial modem is special designed by Hongdian for
industrial user’s requirements. It provides data transmission
channel for industrial monitoring system. H 6821 CDMA industrial
modem uses standard RS-232 interface. User can plug it directly
into industrial PC. After installing the driver software, user can
get access to GPRS network anytime anywhere to transmit industrial
monitoring data. The modem can construct a reliable
link-auto-detection, disconnect-redial wireless data link together
with Wireless Express” software to satisfy the high reliability
requirement of industrial data transmission. Hongdian products have
been widely used for many application areas in the world, such as
electric power, oil field, coal mine safety, weather forecast, and
environment protection, heating pipe line, gas pipe line, street
lamp control, post, bank and many other areas. |
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| - Easy-to-use, flexible, reliable
- Support 800/1900MHZ dualband
- Comply with FCC/SAR and CDG 1/2&3standard
- Data terminal always online or working mode chosen by user
- Real time clock
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| | - Link detection and watch-dog design, ensure the modem is always
active
- GPRS link auto detection and auto redial (together used with
Wireless Express”
- Support voice conversation and dial control
- Use PC to send SMS
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| | | Audio | 1. Support audio conversation and emergency call
2. Support QCELP 13k audio encoding and decoding
3. Support echo control and noise elimination (Optional)
4. Support DTMF | | | CDMA Data | 1. Support IS 707 data service
2. Support 153kbps packet data transmission speed
3. Support Class 2.0 Group 3 fax
4. CDMA 2000 spreading spectrum scheme
5. Comply with IS-95A、IS-95B CDMA air interface standard | | | Interface | 1. Antenna: 50/SMA-K (female)
2. SIM/R-UIM: 3V
3. Data interface： RS-232 | | | Power | 1. Power supply：+7.5~26VDC
2. Consumption：Communication 460mA, Idling 25mA
| | Operation System | 1. Windows 9x/ME/NT/2000/XP
2. Linux | | | Others | 1. Mechanical: 98x100x23 mm (not including antenna and mounting
kits)
2. Weight: 230g
3. Operation temperature: -10~+50℃
4. Related humidity: 90% (non-condensing) |
| | | Controllable power switch | 1. Control the power on/off by interface control lineEasy for user
device to control the operation of the modem
2. Easy to control, the control point is in the air, the ground is
closed
3. Fit the requirement of power saving mode | | Embedded with RF module to monitor the circuit | 1. Embedded RF module circuit detection to monitor the operation of
the module
2. When the RF module is malfunctioned, auto reset the module | | User resets from exterior | 1. The current exceeds 500ms on the reset grounding line to start
the resetting
2. The application layer reset and embedded watch dog function are
double backup, the reliability increased significantly | | | Serial port control reset | 1. Through RS232 control signal to reset
2. Solved the problem of exterior reset occupies I/O resources
3. No negative influence on data communication
4. The working load for coding is small, only dozens lines of
coding is required |
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