Chunghwa Telecom Operations Support Systems (TOSS) is a series of operations support systems designed and deployed for daily operation of broadband services including ADSL-based internet access, IPTV, IP-VPN, FTTx ...etc. TOSS consists of four major systems: (1) TOSS-P for service provisioning, which supports rapid provisioning of customer service order. (2) TOSS-T for trouble handling, which handles customer appeals, identifies the problem precisely and ensures speedy service restoration. (3) TOSS-Q for quality management, which manages the SLA, proactively protects services against performance degradation, and reports service quality to customers. (4) TOSS-N for integrated network management, which simultaneously manages heterogeneous network devices, collects and analyzes network management information, as well as proactively perceives the network faults. TOSS has been introduced to operations of many broadband services, for example network management of IPTV service with over 29 broadcasting channels and over 1,400 on-demand programs for 1 million subscribers in 2007, of Chunghwa Telecom Co., the leading telecom operator in Taiwan, since 2000. It is a field-proven system and meets practical operations requirements.