Data caching for telephony services

We study client-server data caching, both with and without expiration timestamps, to assess its applicability to present and future telecommunications services such as local number portability, toll-free numbers, and mobile telephony. We perform simulation studies to evaluate the empirical performance of a variety of strategies for caching in a client-server setting. Data caching at client locations is found to be an economical and scalable approach to support future data-intensive telecommunications services.