GSM Services

GSM Services:

GSM Services
GSM Services

All the GSM services follow ISDN guidelines.

The GSM services can be divided into three categories. They are:

  1. Teleservices.
  2. Bearer or data services.
  3. Supplementary ISDN services.

The teleservices comprise mobile telephony and mobile originated or base originated traffic.

The data services comprise computer-computer communication and packet Switched traffic.

1. Teleservices:

  • A telephone is the most basic teleservice supported by GSM. Like all other communication systems, GSM speech is digitally encoded and transmitted through the GSM network as a digital stream.
  • An emergency calling service is present, where the nearest emergency service provider can be notified by dialing three digits.

  • It also includes facsimile

  • GSM supports videotext and Teletext transmission.

2. Bearer services or data services:

The bearer or data services are limited to the first 3 layers of the OSI model.
The data can be transmitted using either a transparent mode or a nontransparent mode.
The data services provided by GSM are:
  • The users can transmit and receive data from 300 bps to 9.6 Kbps.
  • Access to users on POTS (Plain Old Telephone Service), ISDN, Packet      Switched Public Data Networks, and Circuit Switched Networks using a variety of access methods and protocols like X.25 and X.32. 
  • It supports Group 3 facsimile (FAX) service. 
  • It supports a bidirectional SMS service, the messages are transported in a store-and-forward manner. The SMS can be sent on point-to-point and cell broadcast mode.

3. Supplementary ISDN services:

  • The Supplementary ISDN services are provided apart from teleservices or bearer services.                                                                                                                   
  • They include:
  1. Call diversion
  2. Number identification services
  3. Closed user groups
  4. Call forwarding services
  5. Call completion services
  6. Multiparty services
  7. Call restriction services
  8. Short messaging service

  • The GSM system also provides General Packet Radio Service. It provides the possibility to access public packet-switched networks through a dedicated traffic channel.
                                                     Must Read>> GSM Architecture

  • The SMS can be used for safety and advisory applications like weather information to all GSM subscribers in range.

Post a Comment

Previous Post Next Post