AMPS

FWA (fixed wireless access)

admin — Tue, 13 Mar 2007 11:06:51 +0000

FWA (fixed wireless access)

Also known as wireless local loop. (Cingular)

Wireless local loop (WLL), also called radio in the loop (RITL) or fixed-radio access (FRA) or fixed-wireless access (FWA), is the use of a wireless communications link as the "last mile" connection for delivering plain old telephone service (POTS) and broadband Internet to telecommunications customers.

Nowdays there are various types of WLL systems.

These are available in Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), IS136 Time Division Multiple Access (TDMA) as well as analog access technologies such as Advanced Mobile Phone System (AMPS), for which there will be independent standards defining every aspect of modulation, protocols, error handling,etc.

Fixed Wireless Terminals or FWT units differ from conventional mobile terminal units operating within cellular networks -such as GSM- in that a fixed wireless terminal or deskphone will be limited to an almost permanent location with almost no roaming or find-me anywhere facilities. » read more »

Dual mode

admin — Tue, 13 Mar 2007 11:01:41 +0000

Dual mode

Describes a handset that works on both analog and digital networks. (Cingular)

The phone is capable of accessing digital or AMPS channels to provide more consistent mobile service (Network- and subscription-dependent feature â€“ not available in all areas.) (Motorola)

Dual mode mobile phones work on more than one network (for example,TDMA and AMPS GSM and DECT). (Ericsson)

CDPD

admin — Tue, 13 Mar 2007 09:54:13 +0000

CDPD (cellular digital packet data)

An enhanced system overlay for transmitting and receiving data over cellular networks. Technology that allows data files to be broken into a number of "packets" and sent along open channels of existing cellular voice networks. (Cingular)

Cellular Digital Packet Data (CDPD) uses unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data. Speeds up to 19.2 kbit/s are possible.

Developed in the early 1990's, CDPD was large on the horizon as a future technology. However, it had difficulty competing against existing slower but less expensive Mobitex and DataTac systems, and never quite gained widespread acceptance before newer, faster standards such as GPRS became dominant.

As of the year 2004, major carriers in the United States are threatening to shut down CDPD service. As of July 2005, the former AT&T Wireless CDPD network is no longer active, and Cingular Wireless CDPD customers have been informed that as of the end of the year, it will be down as well.

(Wikipedia)

Analog

admin — Tue, 13 Mar 2007 09:44:19 +0000

Analog

In telecommunications, a shortened version of the term "analog transmission," which is a way of sending signals- voice, video or data - in which the transmitted signal is "analogous to," or like, the original signal. The traditional method of modulating radio signals so that they can carry information.

The simple way to transmit speech. The first networks for mobile phones were analog. Analog systems include AMPS, NMT and ETACS. (Ericsson)

A transmission method or way of sending voice, video and data using signals (such as electricity or sound waves) that are continuously variable rather than discreet units as in digital transmissions. In the context of wireless communications, analogue refers to transmission networks built in the 1980s and that use analogue technology rather than digital. See also Digital. (Nokia)

The technological basis for most current cellular systems. Primarily designed to transmit sound waves, as in conversations. (Motorola)

Air interface

admin — Tue, 13 Mar 2007 09:43:01 +0000

Air interface

The standard operating system of a wireless network. Technologies include AMPS, TDMA, CDMA and GSM. (Cingular)

In mobile communication, the air interface is the radio-frequency portion of the circuit between the mobile station and the active base station. (Wikipedia)

AMPS

admin — Tue, 13 Mar 2007 09:40:28 +0000

AMPS (advanced mobile phone service)

The analog cellular standard. Another name for the North American analog cellular phone system. (Cingular)

AMPS is used in North and South America. It is also the most common system in the Asia/Pacific region and can be found in countries such as Australia, Hong Kong, New Zealand, South Korea, Singapore, Taiwan, Thailand and Israel. (Motorola)

Advanced Mobile Phone Service (AMPS). The analogue wireless transmission standard (technology) deployed in the 1980s in the United States and Canada. AMPS operates at 800 MHz. (Nokia)

The original standard specification for analog systems. Used primarily in North America, Latin America, Australia and parts of Russia and Asia. (Ericsson)

Advanced Mobile Phone System (AMPS) is the analog mobile phone system standard developed by Bell Labs, and officially introduced in the Americas in 1984. Though analog is no longer considered advanced at all, the relatively seamless cellular switching technology AMPS introduced was what made the original mobile radiotelephone practical, and was considered quite advanced at the time.

Technology » read more »