Previously known as Japanese Digital Cellular (JDC). A Japanese standard for a 2G digital cellular radio system operating in the 800 MHz, 900 MHz, and 1400 MHz frequency bands. PDC employs frequency division duplex (FDD) to support bidirectional communications with the downlink in the 810
(1) (Primary Domain Controller) A service in a Windows server that manages security for its local domain. Every domain has one PDC, which contains a database of usernames, passwords and permissions. The PDC also provides a time service for the network and typically obtains the time from an edge router, which gets its time from the Internet. See domain-based network and BDC.
(2) (Personal Digital Communications) A digital cellular phone system widely used in Japan. Based on TDMA, it transmits in the 810-826 MHz and 1477-1501 MHz bands. PDC is a 2G wireless system. See cellular generations and PHS.