In this paper, we define a new concept in the telecommunication service market, Bridging Telecommunications Service. It is a service concept related to the substitution of consecutive generations of telecommunications services. The roles and characteristics of the bridging telecommunications service are identified and the management strategies for the bridging telecommunications services are developed. The management strategies are developed through the typical sequence of bridging telecommunications service life cycle: strategy for a new service development process, marketing strategy, and service termination strategy. The management strategies developed in this paper are examined and their implications are drawn in the two representative cases: CT-2 service in Korea and the PHS service in Japan.