embedded cdma modem: D120 Series
Cellular IP Gateway Modem
>> Brief
We short name Serial to GPRS Gateway as
GPRS DTU IP Modem. And Serial to CDMA Gateway as CDMA DTU IP Modem.
D120 Series DTU modem enables various kinds of legacy devices with serial port to communicate over cellular network and the Internet easily and freely. It not only works as a cellular modem, but also can construct a smooth "cellular Data Tunnel" between Host and Remote side, ensuring an efficient communication for data transmission and remote device management.
With the selectable RS232/TTL/RS485/RS422 serial port, embedded cdma modem is an ideal solution for factory automation, environmental monitoring and remote device management etc. Meanwhile, it is supplied with simple Software interface that streamline application development process, freeing system integrators from dealing with complex communication protocols of GPRS/CDMA and the Internet. Users do not need to change the existing system, saving cost and time for field maintenance, and making it a perfect solution for data transmission.
D120 Series DTU modem enables various kinds of legacy devices with serial port to communicate over cellular network and the Internet easily and freely. It not only works as a cellular modem, but also can construct a smooth "cellular Data Tunnel" between Host and Remote side, ensuring an efficient communication for data transmission and remote device management.
With the selectable RS232/TTL/RS485/RS422 serial port, embedded cdma modem is an ideal solution for factory automation, environmental monitoring and remote device management etc. Meanwhile, it is supplied with simple Software interface that streamline application development process, freeing system integrators from dealing with complex communication protocols of GPRS/CDMA and the Internet. Users do not need to change the existing system, saving cost and time for field maintenance, and making it a perfect solution for data transmission.
The difference between DTU modem and normal modem
|
Item
|
DTU IP Modem
|
Normal Modem
|
|
Dial up
|
Support automatically dialup;
Online always; trigger to dialup,
schedule to dialup
|
Need machine/pc back platform to dialup
|
|
TCP/IP, PPP
|
Yes
|
Yes
|
|
Interface
|
RS232/RS485
|
RS232/RS485
|
|
Bandwidth for GPRS/CDMA
|
20~60Kbit/s
|
20~60Kbit/s
|
|
Coverage
|
Same as GSM network
|
Same as GSM network
|
|
Transparent Data transmission
|
Yes
|
No
|
|
VDPN
|
Yes
|
Yes
|
|
Point to Point
|
Yes
|
Depends on network
|
|
Point to Multipoint
|
Yes
|
No
|
|
Center to Multipoint
|
Yes
|
No
|
|
Dynamite IP Address Mapping
|
Yes
|
No
|
|
Multi-protocol
|
Yes
|
No
|
|
Applications
|
Utilities, traffic control, finance and
industry supervision, for device not support dialup
|
Mobile Internet access for PC, for device
support dialup
|
DTU: Data Transmission Unit. Someone calls it as IP
modem, or serial IP modem.
It is called as DTU modem by some users.
It is called as DTU modem by some users.
>>Industrial Application
·
Remote Data
Monitor and Control
·
CCTV,
security surveillance
·
Water, gas
and oil flow metering and schedule
·
AMR
(automatic meter reading)
·
Power
station monitoring and control
·
Remote POS
(point of sale) terminals, ATM,
·
Traffic
signals monitor and control, Traffic info guidance
·
Oil field,
weather forecast, environmental protection, street lamp monitoring and control
·
Early
Warning of Mountain Torrent
·
Fleet
management
·
Power
distribution network supervision
·
Central
heating system supervision
·
Weather
station data transmission
·
Hydrologic
data acquisition
·
Vending
machine
·
Telemetry, SCADA
·
Vehicle
logistics and diagnostics controlling
·
Parking
meter and Taxi Monitor
·
Telecom
equipment supervision (Mobile base station, microwave or optical relay station)
Etc.
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