(In topic `Mobile Internet`) DCS (Digital Communications System) is another name for GSM, working on a radio frequency of 1800 MHz. It is also known as GSM 1800 or PCN (see GSM & PCN).
Digital Communications System: another name for GSM working on a radio frequency of 1800 MHz. Also known as GSM1800 or PCN, this digital network operates in Europe and Asia Pacific.