Wi-Fi Technology
Overview of Wi-Fi
Advantages of Wi-Fi
Wi-Fi Alliance
Business Wi-Fi Phones
Disadvantages of Wi-Fi
Dual Wi-Fi Cell (GSM) Handsets
Wi-Fi Embedded Systems
Google Wi-Fi
Wi-Fi History
IEEE 802.11
iPhone Wi-Fi
Microsoft’s Easy Wi-Fi
Wireless Networking Standards
Wi-Fi Software
Standard and Non-standard Devices of Wi-Fi
Wi-Fi Technology
Top Ten Wi-Fi Countries
Top Ten Wi-Fi Locations
Wi-Fi Uses
Other Types of Wireless Network
D-AMPS
Fixed Wireless Data
GSM
Personal Communications Service
WiMax
Home » Other Types of Wireless Network » D-AMPS

D-AMPS
Digital Advanced Mobile Phone Service or D-AMPS also known as DAMPS is a digitally designed system built on the existing advanced mobile Phone Service(AMPS). The former allows time division multiple access(TDMA) which triples the amount of call that can be handled on a channel.

D-AMPS

IS-154 and IS-136 are the second generation mobile phones that are called D-AMPS. This allows for interaction from digital to analogue systems and vice versa.
The security was enhanced from the analogue systems. IS-54 or Interim Standard 54 is the technology that enables digital mobile communication. This later on attained American national standard. The IS-54 is compatible with the AMPS and it is the digital extension of the latter and thus known as D-AMPS or Digital AMPS. It is also known as the United States Digital cellular or USDC.

History of D-AMPS

The earliest mobiles were analog devices and were termed as the 1st generation mobile communication systems. The birth of AMPS was the most successful among the devices but it had a lot of disadvantages. The greatest disadvantage was the fact the increasing demand for mobile communication could not be supported by this. The number of calls were less due to the lack of infrastructure of the cells of the devices. The security of the system was not strong enough to support single user facility. Illegal calls could easily be made by intercepting the serial code of the phone, which was easy. These disadvantages opened a new channel of thought when a search for a better equipped device was made. The result was the invention of D-AMPS.

Technology of D-AMPS

The frequencies that is used by this wireless network is 800 MHz and 900 MHz. The service providers can use frequency from 824 to 849 megahertz range for receiving signals and from the 869 to 894 range to transmit the signal. Each band is divided into sub bands that are of 30 kilohertz. The latter sub bands or channels are termed the reverse channel when receiving and during transmission they are termed as forward channels. The division of bands into channels is done through a technology known as Frequency division Multiple Access(FDMA). The TDMA technology is added to triple the amount of call that may be accessed through a channel. The efficiency of spectrum is 1.62 bit/s/Hz. If a mobile is capacitate with digital technology then the channel that is made available is digital in nature.

Dual mode cellular device

A dual mode is equipped to receive both analog and digital frequency. The devices of a dual mode phone is transmitter, antenna assembly, receiver, control panel and coordinator.

Though the D-AMPS was the first among the second generation mobile communication devices but the requirement of the market has lead to the birth of other wireless networks that are better customized to handle the rising demands in the technical industry. GSM is an example of the technology that is slowly taking over D-AMPS. But the fact remains that the latter was the first among the revolutionary Telecom technologies that would be instrumental in promoting global communication.

For information about Overview of Wi Fi visit wifizing.com.