Transmission system, participation fee management method, computer program product, and maintenance system

A transmission system, comprising:

• a transmission management system configured to manage information on a conference in which a plurality of transmission terminals participate;
• and
• a fee management system configured to manage participation fee information indicating a participation fee incurred when each transmission terminal participates in the conference, wherein the transmission management system includes:
• a plurality of processing servers configured to receive, from each transmission terminal, raw history information on the participation in the conference, wherein each processing server processes the raw history information so as to generate pieces of processed history information;
• a history management server configured to exclude, from the pieces of the processed history information respectively generated by the processing servers, any pieces of the processed history information in which a defect occurs;
• and
• a transmission circuit configured to transmit the processed history information other than the excluded pieces of the processed history information to the fee management system through a communication network, and
• the fee management system includes circuitry configured to
• receive the processed history information transmitted from the transmission management system,
• calculate a total participation time in which each transmission terminal participates in the conference based on the received processed history information,
• calculate a participation fee for each transmission terminal based on the calculated total participation time, and
• sum up participation fees of each transmission terminal to calculate a total participation fee.