A general term for digital cellular phone technologies that are used for personal wireless mobile communication. Personal Communications Services (PCS) technologies were developed in the early 1990s because the existing Advanced Mobile Phone Service (AMPS) technologies were running out of available bandwidth in the electromagnetic frequency spectrum. PCS systems are end-to-end digital in nature and are more secure than analog cellular systems. PCS networks can be used for voice, fax, and data applications such as e-mail and file transfers. PCS systems are generally circuit-switched, although some are being migrated to packet-switched networks.
Some of the standards and technologies that developed from the PCS initiatives include the following:
PCS systems and services can also be classified as follows: