Tributary Solutions Telecom Solutions In telecommunications, secure data storage of call detail records (CDRs), transaction data, and billing are critical to the operational and legal responsibility of the service providers.  Telecom providers face the challenge of storing millions of call data records for their customer billing and call detail records every day. Tributary Systems is the trusted provider of secure, cost efficient, backup storage/data protection solutions to the telecom industry with ViTAL and Storage Director.