Class B Terminal
In a GSM and UMTS system a class B mobile may be attached to both PS (Packet Switched) and CS (Circuit Switched) services, but the mobile can only operate one set of services at a time. When the mobile is in both idle mode (UMTS and GSM) and packet idle mode ( GPRS ) it should be able to monitor paging channels for both circuit switched and packet switched services depending on the mode of network operation.
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