Sony Ericsson P802 manual Technical Explanation of CSD, Hscsd and Gprs, Circuit Switched Data CSD

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For Internal Use Only	P800 Smartphone
	White Paper, May 2002

Technical Explanation of CSD, HSCSD and GPRS

This section provides an overview of the way data communication works in a GSM network environment. This will help you to understand the characteristics of the different solutions supported by the P800 and the parameters which govern the data transmission speeds available.

Circuit Switched Data (CSD)

A modem and landline is a common way to connect to the internet and company networks. The modem establishes a telephone call to the remote server which is ‘circuit-switched’, meaning that a telephone circuit is maintained for the duration of the connection, irrespective of whether data flows or not. The connection has a fixed bandwidth and is normally charged on a connected-time basis.

Server

Circuit-Switched Network

In GSM networks, this facility is widely available and is called Circuit Switched Data (CSD). It is very similar to using a modem, but is subject to lower data transmission speeds due to the connection taking place over the GSM wireless network. The standard speed of operation for CSD is 9.6kbps transmit and receive. 14.4kbps is available in some GSM networks. The P800 will operate at the higher speed where it is available.

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Contents P800/P802 Smartphone Preface Model Markets CharacteristicsContents Receiving a multimedia message on other terminals Gprs Maximum Data Rates kbps Hscsd Maximum Data Rates kbps For Internal Use Only P800 Standard Version and P802 Chinese Version P800/802 Smartphone OverviewP800 Standard Version P800c/P802 Chinese version General Features and Specification SummaryIntegrated Browser AccessoriesP800 Controls and Operation P800 ConnectorsFlip Closed FC mode Flip Open FO mode Flip Removed Application MMI Outline Status Bar User Storage Phone Phone and PIM ApplicationsFor Internal Use Only Contacts Tasks CalendarClock, Voice Memo and Calculator JotterBuilt-In CommuniCam ImagingImage Viewer Using ImagesVideo Playback and Streaming 3GPP PSS Packet Switched Streaming StandardMPEG-4 Standard User scenarios ApplicationsStandards, architecture and protocol Locally Stored Clips P800 Video PlayerStreaming Support in the P800 Messaging EMS Enhanced Messaging ServiceEMS more than just words Sounds and melodiesNew possibilities with messaging Examples of EMS contents and applicationsFor Internal Use Only EMS in the P800 Benefits MMS Multimedia Messaging ServiceMMS objects Text Smil presentationsAudio PicturesNotification TemplatesInteroperability and Conformance Standard Media Confor Render Type Media Object SummaryComposing a multimedia message Receiving a multimedia message on other terminals Receiving a multimedia messageMessage conversion MMS technical featuresMail OTA configurationArchitecture Services Browser, M-Services and MeTMeT Mobile electronic Transactions MeT Example P800 Browser Content Types SupportedBrowser MMI World Wide Web Browser SecurityWAP Security CertificatesService Indication SI Push ServicesService Loading SL WIM Locks PIN CodesOpen Environment Symbian OS Operating SystemPersonalJavaTM JavaSandbox J2ME CLDC/MIDPSecurity Developer SupportSony Ericsson Advanced Developer Support Sony Ericsson Basic Developer SupportUser Customisation CustomisationWallpaper and Application Shortcuts Screen SaverPicture Phone Book Over-The-Air OTA CustomisationRingtones Other Audio CustomisationFactory Customisation Sony Ericsson WAP ConfiguratorBenefits of Bluetooth wireless technology in the P800 BluetoothTM Wireless TechnologyBluetooth Headset Bluetooth Usage Cases with the P800Laptop PC / PDA Mobile DevicesDesigned for the requirements of the wireless world What is SyncML?Synchronization & Data Transfer SyncML An Open Standard for SynchronisationApplication Remote Local Which information can be synchronized?Remote Synchronisation Bluetooth, Infrared or CableLocal Synchronisation Automatic synchronization Backup and RestoreIntelligent process CompatibilityObject Exchange ‘Send As’ Bearer BluetoothMail Application Data TypeGPRS, Hscsd and CSD Connections Using the P800 as a ModemFor Internal Use Only Technical Explanation of CSD, Hscsd and Gprs Circuit Switched Data CSDHigh Speed Circuit Switched Data Hscsd 6kbps per 14.4kbps per Timeslot Gprs Analogue and Isdn V110 Bearer Service Types36.2 53.6 CS-1 05kbps CS-2 13.4kbps13.4 For Internal Use Only Product Name and Languages P800c/P802 In DetailInput Methods FC Character InputVirtual Keyboard FO Character InputHandwriting Recognition Lunar Calendar Chinese DictionaryWuZiQi Five Stone Chess Service Description SIM-AT Services supported by the P800SIM Application Toolkit Profile Download Consumer Kit and CD-ROM DPY Kit ContentsP800 Standard Version Language SupportP800c/P802 Chinese Version CD-ROM Contents 3GPP Terminology and AbbreviationsFor Internal Use Only JVM RAS VPN Related Information MMS Useful ReferencesTrademarks and Acknowledgements Technical Specifications Input KeypadMMI Languages Third Party Application SupportPersonal Organiser TelephonyIntegrated CommuniCam Image ViewerImage Editor Services Integrated browser technical dataMeT User CustomisationInfrared Transceiver technical data Bluetooth Wireless Technology technical dataPC Connectivity Solutions Remote SynchronisationLocation Based Services Remote ConfigurationSecurity