About gprs modem

The Global System for Mobile Communications Service is the most widely adopted, digital cellular technology in use today. GSM uses time and frequency division techniques (TDMA and FDMA) to optimize the call carrying capacity of a wireless network. GSM also provides a number of carefully standardized and broadly supported capabilities such as Short Message Service (SMS), circuit switched data (CSD) and General Packet Radio Services (GPRS modem). Used on the quad band GSM850/900/1800/1900Mhz 2.5G modem is from mobile communication technology (GPRS), which has become widely used of industrials and utilities in recent years and many customers are seeking reliable, flexible and cost-effective data channel to build their information system. Many applications such as ATM, POS, SCADA and surveillance system will require data channels covered all country; this brings a bright future for GPRS data networks applications.Requirements towards information system are varied because of different features of numerous industrial applications. Mobile telecom service providers are required to provide industrial application solutions not only meeting common specifications and also individual special ones

4G router can only work in the 4G network?

No, 2.5G, 3G, 4G router key difference lies inside the network communication module, 4G router, there are two, one is a quasi-4G essence WCDMA HSPA + technology, not true 4G. Another is the real 4G LTE technology. For example, The E-lins technology, H685 and H820 series router, specifically for substance networking router wireless communication design, use of public LTE / WCDMA / EVDO / HSPA + wireless long-distance network to provide users with data transfer function. The product uses a high-performance industrial grade 32 communications processors and industrial grade wireless module for embedded real-time operating system software support platform, while providing an RS232 (RS485/RS422 optional), one or four Ethernet network and a WIFI interface, which can connect serial devices, Ethernet devices and WIFI equipment, transparent data transmission and routing functions. The products have been widely used in the networking industry chain in the M2M industry, such as video surveillance, three tables (meter, water meter, gas meter), smart grid, intelligent transportation, smart home, finance, mobile POS terminals, supply chain automation, industrial automation, intelligent building, fire, public safety, environmental protection, meteorology, digitized medical, telemetry, military, space exploration, agriculture, forestry, water, coal, petrochemical and other fields.

Industrial Application of gsm modem

let me tell you detail: Industrial Application of gsm modem 1) Remote Data Monitor and Control; 2) CCTV, security surveillance; 3) Water, gas and oil flow metering and schedule; 4) AMR (automatic meter reading); 5) Power station monitoring and control; 6) Remote POS (point of sale) terminals, ATM, 7) Traffic signals monitor and control, Traffic info guidance; 8) Oil field, weather forecast, environmental protection, street lamp monitoring and control 9) Early Warning of Mountain Torrent; 10) Fleet management; 11) Power distribution network supervision; 12) Central heating system supervision; 13) Weather station data transmission; 14) Hydrologic data acquisition; 15) Vending machine; 16) Telemetry, SCADA; 17) Vehicle logistics and diagnostics controlling; 18) Parking meter and Taxi Monitor; 19) Telecom equipment supervision (Mobile base station, microwave or optical relay station)

Q8 Vehicle GPS Tracker

Q8 is a GPS tracker for vehicle, mini size and light with ID certification. With Q8 GPS tracker, users can remote control to keep vehicle safty. Main Spec GSM: 850/900/180/1900Mhz quad band GPRS: Class 12, TCP/IP build in GSM Module Tracking sensitivity: -159dbm Acquistition sensitivity: -144dbm Locating time cost: host start

Diaoyu Islands belong to China

Long long ago, Diaoyu Islands belong to China!and now too! Strong opposition to Japan.

IPC400N Indoor Box IP Camera(ccd, cmos)

IPC400N series IP camera is based on IP network to achieve network digital surveillance, transmit clear, smooth video surveillance images. IPC400N Series H.264 ip camera uses 1/3"SONY CCD ,advanced H.264 codec, supports dual streaming, transmit high-quality H.264 video in the low-bandwidth network environment smooth, also supports MJPEG compression; Support DC drive auto iris lens; Support audio, alarm function, provide third-party systems integration interface. The series are suitable for public security, banking, ports, schools, buildings, residential zone and other places, It is a good choice for digital HD video network surveillance. more detail: www.szelins.com/IP_Camera_List.html

The Key Features of IPC403H-MPX-IR8 High Speed Outdoor Dome IP Camera

The Key Features of IPC403H-MPX-IR8 High Speed Outdoor Dome IP Camera: 1) 9 imported high-power super lattice array of infrared lights, IR distance 180M(Max) 2) Up to 8 privacy masking areas (Requires camera to support) 3) Infrared auto-dimming technology, Low-carbon environmental protection and energy saving of 50%, the infrared lamp life up to 3x 4) Unique cooling technology,Cooling effect is good, high reliability, dustproof and waterproof 5) Park, set the ball machine idle for some time, automatically call preset, scan, cruise mode, the path functions 6) 256 Preset points 7) 8 Patrols, each patrol up to 32 presets 8) 4 Patterns, 500 commands(about 30 minute)/pattern 9) Auto scanning:8 10) PELCO_P, PELCO_D and other control protocols automatic identification 11) Horizontal rotation range: 360°, Vertical rotation range :180 12) Horizontal speed:0.01~350°/S; Vertical speed:0.01~120°/S 13) H.264/MJEG is optional, dual streaming,high compression ratio,and high quality. 14) Support Micro SDHC storage; SD2.0 standard 15) Title, date and time, stream information, azimuth angle, zoom display 16) Support: TCP/IP, UDP, RTSP, HTTP, DDNS, FTP, NTP, PPPOE, SMTP Support ONVIF protocol 17) Built-in Web server enables the use of a standard Web browser for viewing and management. 18) IP66 rating 19) Lightning protection design, 3000V surge protection

RS232 Serial to Ethernet Gateway Data Converter

this is a new product,many futions!H800 is a 3G cellular router. It is also a RS232 Serial to Ethernet Gateway Data Converter with its RS232 ethernet port feature. In China we call rs232 to cellular gateway as DTU modem. H800 3G WCDMA Router is a kind of HSUPA router providing 14.2Mbps download and 5.76Mbps upload maximum. High speed can make the perfect solution for the large volume wireless data transmission requirement. The H800 series GPRS/CDMA/3G RS232 serial to ethernet gateway based on GPRS or CDMA or 3G HSDPA HSUPA EVDo 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. H800 GPRS/CDMA/3G DTU provides RS-232/RS-485 interface. Embedded with PPP, TCP/IP and DDP protocol, it converts the user data into GPRS or CDMA 1x or 3G network and transmits the data into the customer’s data service center. With the professional designing, the H800 GPRS/CDMA/3G DTU provides the plug and play, easy to use and maintenance features.

Surprised！U.S. skeptical of Chinese swimmer's performances

So Surprised report！LONDON -- As a top American swimming official described Chinese phenom Ye Shiwen's performance as "impossible," one of the U.S. swimmers scheduled to oppose her for a medal Tuesday stopped just short of calling for an investigation. Ye set a world record in winning the women's 400-meter individual medley Saturday, swimming her final 25 meters faster than Ryan Lochte swam his final 25 meters in winning the men's 400 individual medley. On Monday, Ye set an Olympic record in a lopsided victory in the semifinals of the women's 200 IM, prompting waves of suggestions she might be using performance-enhancing substances. Caitlin Leverenz, the top U.S. swimmer in the event, said she preferred to focus her energy on swimming rather than doping. "I can't do anything about it," Leverenz said Monday. "That's USADA's and FINA's job, to do something about it. The Chinese have a history of doping in the past. I don't think people are wrong to point fingers. But I don't think that's my job." Ye, 16, denied her performances were drug-aided. "There's absolutely no problem with the doping," Ye said Monday, according to a translation provided by the official Olympic News Service. "The Chinese team has always had a firm policy about doping." The Chinese removed another 16-year-old swimmer from their team last month after a positive test for a banned substance. More than 40 Chinese swimmers tested positive for steroids in the 1990s, according to the London Times.

IPC401B-MPC-WDRD Low Light HD Outdoor Box IP Camera with Waterproof and IR

IPC401B-MPC-WDRD series outdoor IP camera based on IP network to achieve network digital surveillance, transmit clear, smooth video surveillance images. IPC401B-MPC-WDRD series outdoor waterproof ip camera uses 1/3" Progressive Scan WDR CMOS and advanced H.264 codec, Maximum resolution: 1280*720, excellent wide dynamic function, low light performance. Supports dual streaming, Transmit high-quality H.264 video in the low-bandwidth network environment smooth, also supports MJPEG compression; Built-in fixed aperture zoom lens; support day/night auto converting; dual IR-Cut filter, even in low light environment or even black can output a clear picture. 4 IR LEDs, IR distance 50m.Support audio, alarm function, provide third-party systems integration interface. This series of products using the waterproof design and removable shell ,not only provides excellent waterproof and dustproof performance, but also easy installation and removal, suitable for indoor / outdoor environment. The series of products applicable for corridor, warehouse, residential zone, underground parking, supermarkets, bars and other low light or total darkness environment. It is a good choice that upgrade from analog surveillance to network digital surveillance With video surveillance system software platform, can realize different network environments of large-scale network surveillance.

Look forward to the London Olympics opening ceremony

Look forward to the London Olympics opening ceremony!Compared with the Beijing Olympic Games，London Olympics Will be more exciting.There are four hours began，so Let's countdown！Now I like a child just as excited！Wish the London Olympic Games a complete success！

Who are the real king?

Today,Celtics almost the audience at a disadvantage, the two sides to rest one day after the life and death in Miami.Come this far, both sides do not have to mobilize. Win or go home, Heat facing problems. James did not smile from the play from the solemn expression on his face. He faces more pressure than anyone else, James will be the pressure and turned it into the score. We look forward to Game 7.Do you thinkWho in the Finals? more focus on nba.

Happy Mother’s Day 2012

Some people said.2012 is End of the world! So we love more mother! we stop complaining and start enjoying your day with your beloved parents! when I saw the title I was happy to see s omething positive To everyone out there Happy Mothers Day and have a great weekend! hold a laser light party for mother！ Wish you have a wonderful party.Happy Mother’s Day!

Wonderful information - technology regarding the modem dongle

1. Each modem has a band specification.
3G WCDMA band: 2100Mhz, 850Mhz, 1900Mhz, 900Mhz
2G GSM band: 850Mhz, 900Mhz, 1800Mhz, 1900Mhz.

Each modem/dongle/cellphone/device requires a SIM card to work.
Normally the modem cannot support all band of 3G WCDMA, normally should be the following choice:
3G single band + gsm dual band;
3G single band + gsm quad band;
3G dual band + gsm quad band;
3G tri band + gsm quad band;


3G CDMA2000 EVDO band: 800Mhz, 1900Mhz, 450Mhz
2G CDMA1x band: 800Mhz, 1900Mhz, 450Mhz
CDMA1x and CDMA2000 has two types. One is with UIM card, the other is without UIM card, but need write number into modem/dongle/cellphone/device.

2. Each modem contains IMEI, the unique number from the world. It’s the cellular device’s ID.
A few of network carrier requires IMEI when the modem dialup to networks. But most no need.

3. If the modem works with sim card or uim card, the card should support Data Business and has enough balance.
Sim card/uim card has Voice Business, Data Business, and SMS Business. So if you want internet, the sim/uim card requires Data Business available.
article come from: http://www.szelins.com/blog/technology-regarding-the-modem-dongle.html , and we hope that you can focus our 3g usb stick .