Securities Company Network Transformation Research

The thesis analyzes the importance of information system in the securities companies. Usually, the securities companies' networks include speech communication network, exchange network, data transmission network and so on.The thesis put forward the alteration projects of concentrate exchange system. Three projects are provided as follow.1. 2M SDH digital circuit to be the active one, ISDN BRI analog line to be the on-line standby one by PSTN;2. 2M ATM digital circuit to be the active one, 2M SDH digital circuit to be the on-line standby one;3. 2M SDH digital circuits to be the active one, satellite transmission circuit to be the on-line standby one.Both analysis and experiment show that, of the three methods, the third one is the best, and it has been successfully put into practice.In conclusion, the developed methods provide a better way to build the securities company's information system.