This book constitutes the refereed proceedings of the Second International Workshop on Databases in Telecommunications, DBTel 2001, held during VLDB 2001 in Rome, Italy in September 2001. The 12 revised full papers presented together with an invited paper were carefully reviewed and selected from 18 submissions. Among the topics addressed are data warehousing, telecommunications data management, data mining, query processing, embedded control systems, broadband services, brokering architectures, distributed objects, network convergence, and universal information models.