General Packet Radio Service(GPRS) provides GPRS users packet switched data service. However,in existing GPRS applications,GPRS specification does not support push access such as call termination(incoming call).

• 通用无线分组业务(GPRS)在为用户提供无线分组数据传输服务中；GPRS网络不直接提供GPRS设备的被动访问服务.