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2007 MTSC Training Course

2007 MTSC Training Course. OnCell G2150I. Thomas Cheng & Li Peng. 2007 Autumn. 09/20 Schedule. Cellular Modem: OnCell G2150I. Cellular concept & G2150I Introduction Mobile network Product introduction (G2150I specs, antenna) AT C ommands OnCell Configurator Cellular applications

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2007 MTSC Training Course

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  1. 2007 MTSC Training Course OnCell G2150I Thomas Cheng & Li Peng 2007 Autumn

  2. 09/20Schedule Draft

  3. CellularModem:OnCell G2150I • Cellular concept&G2150IIntroduction • Mobile network • Product introduction (G2150I specs, antenna) • AT Commands • OnCellConfigurator • Cellular applications • CSD withHands-on • SMS Tunnel withHands-on • GPRS withHands-on • Appendix: • Troubleshooting / FAQ / Certificate / GPRS (Linux)

  4. Introduction to Mobile Networks

  5. Circuit-Switched Voice Telephone Service Phone Line / PSTN Phone Line / PSTN PBX /Operator Voice / Analog Signal *PSTN: Public Switched Telephone Network *PBX: Private Branch Exchange

  6. Modem and Circuit-Switched Data (CSD) Communication PBX /Administrator Phone Line Phone Line Analog Digital Digital RS-232 RS-232

  7. Transmit and receive data Transmit and receive data Establish connection Establish connection • CSD Features • Simulates a long serial cable • Dynamic destination Modem and CSD via PSTN +886289191230 +886289191231 +88689191232 Modem Modem Modem Modem Serial Serial Serial COM1 Legacy DOS software CNC machine CNC machine CNC machine

  8. Electric Meter Electric Meter Electric Meter Electric Meter Cellular Station Cellular Station Cellular Station G2150I and CSD via Mobile Network 2. Transmit and receive data 1. Establish connection PBX /Administrator

  9. Modem and Internet Access PPP connection Database • ISP RAS Server E-mail Internet PSTN Internet Modem Modem PC-based machines access Internet via dial-up networking Internet Skype/MSN http://www

  10. Cellular Station Cellular Station 1G – Mobile Radio Phones Phone Line / PSTN Backbone PBX /Administrator Analog

  11. 1G –Wireless Telephone Technology • Analog mobile phones – noise sensitive • No roaming ability to other 1G Carriers • Security issues – no protection from eavesdropping or cloning • No data Communication • Standards: • NMT – Nordic Mobile Telephone • AMPS – Advanced Mobile Phone System • TACS – Total Access Communications System

  12. Dr.MartinCooperofMotorola made first US analog mobile phone call in 1973

  13. Cellular Network • Cellular network • Radio network made up byradio cells • Each served by a fixed transmitter (cell site or base station) • Advantages: • Increased capacity • Reduced power usage • Better coverage

  14. Cellular Station Cellular Station 2G – Mobile Radio Phones Phone Line / PSTN Backbone Analog PBX /Administrator Digital Digital

  15. 2G – Wireless Telephone Technology • Digital mobile phones • Encrypted digital voice • Better sound quality • More system capacity • Digital voice is compressed/multiplexed • Less radio power, smaller cells • Roaming between areas and carriers • Data service (CSD)

  16. Global Service for MobileCommunication • European Telecommunications Standards Institute (ETSI ) launched 1st GSM standard in 1990. • TDMA based(Time Division Multiple Access) • Increasing international roaming • SMS/CSD and fax service • WAP (Wireless Application Protocol ) supported • SIM is required • GSM Worldhttp://www.gsmworld.com

  17. Cellular Station Cellular Station Short Message Service Backbone PBX /Administrator Digital Digital

  18. The Need for Data Transmission Mobile Pone Internet Access PC Internet Access

  19. Cellular Station GPRS Mobile Network PPP connection Database • ISP E-mail Internet Internet Modem PC-based machines access Internet via dial-up networking Internet Skype/MSN http://www

  20. GPRS (General Packet Radio Service) • Combining GSM with GPRS=2.5G • Mobile Data Service available to GSM users • Billed per package (128 bytes) • Packet-switched • PPP, IP supported • WAP • MMS (Multimedia Message Service) • Push Mail • High-speed Internet access for mobile phones&PCs

  21. 2G • 2.5G • 3G • 4G The History of Mobile Phones

  22. 1G • 2G • 3G Wireless Telephone Technology • NMT • AMPS/TACS/ETACS • Hicap • Mobitex • DataTac • GSM • iDEN • D-AMPS • IS-95/cdmaOne • PDC • CSD • PHS • GPRS • HSCSD • WiDEN • CDMA2000 1xRTT/ • W-CDMA • UMTS (3GSM) • TD-CDMA/UMTS-TDD • 1xEV-DO/IS-856 • TD-SCDMA • GAN (UMA) • HSPA • HSDPA • HSUPA • HSPA+ • HSOPA For Voice Only For Voice and Data

  23. Product Introduction - Hardware Specs OnCell G2150I

  24. Overview • DC 12-48V input • Reset • Antenna (0 dBi) • SMA connector • SIM Card • ①Push • ②Open • LED Indicator • Signal Strength • Power/GSM/GPRS/Data • LED indicators • Signal strength (RSSI) • Power/GSM/GPRS/Data Serial Port RS-232 (DB9F) RS-422/485 (TB) • Serial port • RS-232 (DB9F) • RS-422/485 (TB)

  25. Specs – Cellular Communication • Quad Band • 850/900/1800/1900 MHz • SIM Card • Support 3V/1.8V • 5V not support (Old Version)

  26. Specs – GPRS • Class 10 • Code Scheme

  27. Specs – SerialInterface

  28. Specs – Others • Power Consumption(@12V) • Idle: 50 mA • Peak:900 mA • GSM link: 300 to 400 mA • GPRS link: 400 to 600 mA

  29. Product Introduction - Antenna Types OnCell G2150I

  30. Antenna Types • Omni-directional • Dipole antenna • Directional • Flat panel antenna • Yagi antenna • Grid antenna

  31. Omni-Directional Antenna • Provides 360-degree transmission • Used for coverage in all directions High Gain Ant. Dipole *E-PLANE: vertical/elevation plane *H-PLANE: horizontal/azimuth plane

  32. Directional Antenna • Concentrates transmission power in a particular direction to increase transmission distance • Small coverage angle Flat panel Grid Yagi

  33. G2150I Antenna – Standard & Optional Accessories *Gain:Power of signal *VSWR: Voltage Standing Wave Ratio

  34. RSSI (Receive Signal Strength Indication) • Measurement of the received radio signal strength • Energy integral (not quality) • Range: from 0 to 31 • How to verify?

  35. Q&A: How to Select Antenna Type? • Step 1: Location • City (stations and clients): Omni-directional antennas • Fields or open spaces: Directional antennas (point to stations) • Step 2: Check data field • Indoors or outdoors (streets): Omni-directional antenna • Outdoors (top of buildings, mountains...): Directional antenna

  36. Q&A: How to Select Proper Antenna Spec.? • Step 1: Check antenna specifications • V.S.W.R < 2.5 , Impedance = 50 ohm, Band = 850/900/1800/1900 MHz • Connecter = SMA connecter • Step 2: Check type of antenna • Omni-directional: check RSSI • Directional: rotate the antenna and find the highest power. • Step 3: Check RSSI > 12 (when using 0 dBi antenna) Tip: Select up one level

  37. Q&A: Will High Gain Antenna Fix All Problems? • 1. Not only gain, but also impedance and VSWR. • 2. Environment: • Finding the best place for the best signal inside a building is better than using a high-gain antenna. • E.g., concrete walls will decrease the signal. • 3. An antenna will improve the receive sensitivity • It will not change the emitpower of a cellular product. • 4. High-gain antennas are of no use if there is no signal.

  38. AT Commands OnCell G2150I

  39. Dialing Data Mode Command Mode Dialing (Command Mode) • ATD+886289191230 • RING • RING • RING… • ATA • CONNECT • CONNECT abcd1234 abcd1234 • +++ • OK • ATH • OK NO CARRIER

  40. AT Commands • Modem commands to get modem's attention • Two modes • Command Mode: Send commands to a local modem • Data Mode: Send data to a remote modem

  41. Controlling Modem via AT Commands ATD+886123456404 (Enter) > "+886123456789" AT+CMGS= Hello! Moxa. (SMS message) (Ctrl+Z) OK

  42. MOXA Proprietary Commands (AT*)

  43. More than 100 AT Commands • General commands • Call control commands • Network service commands • Security commands • Short message commands • Data commands • GPRS commands • Moxa extended commands *AT Commands Doc is on the MTSC Training CD CD Path:\\06_OnCell_G2150I\Presentation\Others_Documents

  44. Coffee Break Confidential

  45. A Powerful and Friendly Utility → Moxa OnCell Configurator

  46. Moxa OnCell Configurator • Overview • A tool to manage and configure G2150I under Windows • Graphical interface, easy to learn and use • Reduce effort in using AT Commands • Good for mass deployment and pre-configuration

  47. Moxa OnCell Configurator • Most important two benefits: • Step-by-step installation procedure • Configuration Profile can be stored and replicated

  48. Installation of Moxa OnCell Configurator • To install OnCell Configurator • Double click on the file *OnCell Configurator is on the MTSC Training CD CD Path:\\06_OnCell_G2150I\SW\Configurator

  49. Using OnCell Configurator • Before launching Moxa OnCell Configurator • Connect OnCell’sRS-232 port to host PC • Set DIP SW1 to "ON" for RS-232 connection *You may use UPort 1110 or your PC’s COM port for connection

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