Abstract: A full-T cross apparatus and method are provided. The full-T cross apparatus includes an input module, which includes multiple input channels; and multiple output modules, each of which includes an output channel, an output control module, and multiple data storage modules. Each of the multiple data storage modules is corresponding to each of the multiple input channels of the input module. The multiple output modules are configured to receive service data from the multiple input channels according to the output channels corresponding to the service data, and send the service data according to output time slots corresponding to the service data. In this way, the chip size is reduced to some extent, and further, the costs and power consumption of the chip are reduced.

Abstract: The present invention relates to the preparation of the (S)-(?)-amlodipine and (R)-(+)-amlodipine by means of enantiomeric separation of racemic amlodipine mixture, in which, L- or D-tartaric acid is used as resolution agent, and organic solvent containing 2-butanone is used as solvent. The 2-butanone used in the present invention has the advantage of low boiling point, low toxicity, litter pollution, and the method is suitable for large-scaled production.

Abstract: A system for operation and maintenance of network devices, including a device layer including at least one network device and a pre-processing layer including pre-processing device(s); the network device obtains a CDR of a call and transmits the CDR to the pre-processing device; the pre-processing device filters the CDR and performs centralized operation and maintenance of network devices. The network device forming the device layer, the pre-processing device forming the pre-processing layer and a method for operation and maintenance of network devices in the above system are also provided. Through the technical scheme, call services are separated from operation and maintenance management and functions of the network devices are unified, which results in more stable operation of the network devices; the operation and maintenance management will be more flexible and it becomes easier to monitor the whole network and to perform operation and maintenance of network devices.