Later, many AMPS networks were partially converted to D-AMPS, often referred to as TDMA ( though TDMA is a generic term that applies to many cellular systems ).

Rogers Wireless has dismantled their AMPS ( along with IS-136 ) network ; the networks were shut down May 31, 2007.

Bell Mobility and Telus Mobility, who operated AMPS networks in Canada, announced that they would observe the same timetable as outlined by the FCC in the United States, and as a result would not begin to dismantle their AMPS networks until after February 2008.

* Bell Mobility and Telus Mobility operated AMPS networks in Canada, though they have since been overlaid with digital services.

Both Bell Mobility and Telus Mobility had announced that they would observe the same shutdown guidelines as in the United States, and decommissioned their AMPS networks in 2008.

The Dobson AMPS and TDMA networks were shut down on March 1, 2008.

As part of the introduction of mobile phone competition in Australia, the Australian government mandated GSM as the new standard for mobile networks, and required that Telstra close the AMPS network by 2000.

This frequency band was designated by the United States FCC and Industry Canada to be used for new wireless services to alleviate capacity caps inherent in the original AMPS and D-AMPS cellular networks in the 800-894 MHz frequency band ( commonly referred to as the " 850 MHz band ").

Since then, support for the service has expanded to include other mobile technologies such as ANSI CDMA networks and Digital AMPS, as well as satellite and Landline networks.

Alltel, who primarily uses CDMA2000 technology but acquired a TDMA network from Western Wireless, shut down its TDMA and AMPS networks in September 2008.

Both the AMPS and IS-136 networks have been decommissioned ; they were shut down on May 31, 2007.

With the removal of analog network cells nearly all over the world, the DynaTAC models running on AMPS or other analog networks are mostly obsolete.

Phones compliant with the GAIT standard can operate on either contemporary GSM networks, or the legacy IS-136 TDMA and AMPS networks found extensively throughout North America.

A GAIT-compliant mobile phone typically accepts a SIM card, similar to a standard GSM phone ; however, depending on the wireless provider, the SIM card enables access not only to that wireless provider's GSM network, but also enables use of the telephone on any TDMA or AMPS networks run by the wireless provider.

Rogers Wireless, meanwhile, never offered a GAIT solution to customers, as their entire IS-136 TDMA and AMPS networks were overlaid with GSM by the time the service was launched.

The company operates AMPS and IS-136 networks on the 800 / 850 MHz band and a GSM network on the 1800 MHz ( DCS ) band in its licensed coverage area, the state of Minas Gerais.

As of February 18, 2008, carriers in the United States were no longer required to support AMPS and companies such as AT & T and Verizon have discontinued this service permanently.

AMPS and D-AMPS have now been phased out in favor of either CDMA2000 or GSM which allow for higher capacity data transfers for services such as WAP, Multimedia Messaging System ( MMS ), and wireless Internet access.

All AMPS carriers have converted most of their consumer base to a digital standard such as CDMA2000 or GSM and continue to do so at a rapid pace.

Unlike in the United States, the Canadian Radio-television and Telecommunications Commission ( CRTC ) and Industry Canada have not set any requirement for maintaining AMPS service in Canada.

The service was discontinued in conjunction with the retirement of the parent AMPS service ; it has been functionally replaced by faster services such as 1xRTT, EV-DO, and UMTS / HSPA.

* Telecom New Zealand — Operated an AMPS / TDMA network in New Zealand from 1987 until 2007 throughout the whole country and the network was renowned for its superb coverage, In 2000 Telecom announced that they would discontinue the AMPS network within 5 years ( 2005 ) to give customers an opportunity to transition to the CDMA2000 and later 1XRTT technologies that replaced it.

Advanced Mobile Phone System ( AMPS ) is an analog mobile phone system standard developed by Bell Labs, and officially introduced in the Americas in 1978, Israel in 1986, and Australia in 1987.

AMPS was originally standardized by ANSI as EIA / TIA / IS-3.

Laws were passed in the US which prohibited the FCC type acceptance and sale of any receiver which could tune the frequency ranges occupied by analog AMPS cellular services.

Service on the remaining 850 MHz AMPS markets was discontinued along with 850 MHz D-AMPS service on February 18, 2008, except in areas where service was provided by Dobson Communications.

It was the third largest AMPS network, by subscribers, in the world at the time of its turndown.

Cellular Digital Packet Data ( CDPD ) was a wide-area mobile data service which used unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data.

Ānanda Mārga, organizationally known as Ānanda Mārga Pracaraka Samgha ( AMPS ), meaning the samgha ( organization ) for the propagation of the marga ( path ) of ananda ( bliss ), is a social and spiritual movement founded in Jamalpur, Bihar, India in 1955 by Prabhat Ranjan Sarkar ( 1921 – 1990 ), also known by his spiritual name, Shrii Shrii Ánandamúrti.

The usage by a subscriber in a visited network is captured in a file called the TAP ( Transferred Account Procedure ) for GSM / CIBER ( Cellular Intercarrier Billing Exchange Record ) for CDMA, AMPS etc ... file and is transferred to the home network.

This technology, similar to AMPS, was also used in the UK by Vodafone and Cellnet.

Telecom originally operated a TDMA ( AMPS, Digital D-AMPS / TDMA ) mobile network ; this was superseded by its CDMA network.

The station moved from channel 79 to channel 57 on July 1, 1983, because of complaints that it was interfering with mobile radio in the Toronto area, and so that the frequencies used by channels 70 to 83 could be reclaimed for use by new AMPS mobile phones as a result of a CCIR international convention in 1982.

Developed by Bell Labs in the 1970s and first used commercially in the United States in 1983, AMPS operates in the 800 MHz band in the United States and is the most widely distributed analog cellular standard.

This standard won over Motorola's Narrowband AMPS or N-AMPS, an analog scheme that increased capacity by cutting down voice channels from 30 kHz to 10 kHz.

* 1990: analog AMPS was superseded by Digital AMPS.

It ran AMPS and D-AMPS across most of the territory covered by the BellSouth landline company.

After that point, however, most cellular companies were eager to shut down AMPS and use the remaining channels for digital services.

D-AMPS uses existing AMPS channels and allows for smooth transition between digital and analog systems in the same area.

It is a digital extension of AMPS and so it is also quite widely known as Digital AMPS ( D-AMPS ).

A dual mode phone uses digital channels where available and defaults to regular AMPS where they are not.

The digital verification color code ( DVCC ) is the equivalent of the supervisory audio tone used in the AMPS system.

Native Alltel markets consisted of both analog ( AMPS ) and digital ( CDMA ) technologies.