Rabu, 29 April 2009

GSM & CDMA

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What is GSM?
GSM is the acronym was originally from Groupe Speciale Mobile, a committee of the Conference of European Posts and Telecommunications is appointed to develop wireless communication, and then better known as Global Systems for Mobile communications (GSM), developed first in Europe with the main frequency is 900Mhz system digital wireless communication second generation (2G)

What is a SIM card?
Is short for Subscriber Identity Module, card that contains the data network operator ID, operator telephon, PIN and user data such as Phonebook or sms

What is IMEI?
International Mobile Equipment Identity, a unique identity code from the mobile device that is recognized internationally, the code for the general mobile phone IMEI: * # 06 #
Who are the GSM Operator in Indonesia?
Telkomsel, Indosat, Satelindo, Excelcomindo, Lippo-Telecom, HCPT

What products GSM operator Indonesia?
Products GSM operator in India can be checked this post and post this review while the full features can be seen in this post
GSM services and features

What is Call Waiting, Call Hold and Multiparty Calling?
Call Waiting is a service that allows the caller to enter numbers that are dituju even have to talk with and Call Hold the phone for a while can stop the conversation with the caller and then replaced with the first caller with the caller does not decide the first. While Multiparty Calling is a service that allows the caller over the first and the second to speak with the be smth. How many of the caller can conference together depends on the ability of the Operator.

What is FR, EFR, and HR?
Codec (coder and encoder), which change the signal into voice data, determine the clarity of sound heard from the phone, FR (Full Rate) has a quality standard, HR (Half Rate) have a quality below the standard and EFR (Enhance Full Rate) have any quality in the above standard. So that the phone can reach the required quality of EFR meals and support from mobile phone operator.

What is the SIM Tool Kit?
Services on the SIM card that allows the service to offer Vas (Value Added Service) to customers, eg mobile banking, or download content.

What is the Clip and CLIR?
Calling Line Identification Presentation (Clip) is a service that allows to display the identity (number) of the caller while, Calling Line Identification Restriction (CLIR) is used to hide the identity (number) of the caller.

What is SMS and SMSc?
SMS (Short Message Services) is a text-based service that allows users to send short messages (160 characters) to other mobile phone users through SMS Center (SMSc) that will control the lalulintas message is short.

What is WAP?
Wireless Application Protocol, a standard that allows mobile phones to access the Internet and other wireless services.

What is the CSD and HSCSD?
Circuit Switch Data (CSD) and High Speed Circuit Switch Data) data generation is a service of the GSM to access the WAP through the Data Call per session (depending on the initialization time). CSD has a transfer rate up to 14.4 Kbps and has a transfer rate HSCSD up to 43.2 Kbps.


What is CDMA
is a form of pemultipleksan (not a scheme pemodulasian) and an access method with which to share the channel is not based on time (as in TDMA) or frequency (as in FDMA), but with the way data Content with a special code associated with each channel is and use the nature of the constructive interference code to make it special pemultipleksan. CDMA also refers to the digital cellular phone system using the access scheme together, such as that initiated by Qualcomm.

Which 3G
is the abbreviation of the term in English: third-generation technology. This term is generally used to refer to the development of wireless phone technology (wireless)

What 4g
is the abbreviation of the term in English: fourth-generation technology. This term is generally used to refer to the development of mobile phone technology. 4g is the development of 3G technology. The official name of this technology 4g IEEE (Institute of Electrical and Electronics Engineers) is the "3G and beyond." 4g technology is a term from English serapan: fourth-generation technology. This term is generally used to describe the development of mobile phone technology.

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