Transmission loss guidelines for cellular mobile carrier interconnection

The Cellular Services Compatibility Seminar (CSCS), has developed transmission loss guidelines for the three types of interconnection links between the Cellular Mobile Carrier (CMC) network and the Local Exchange Carrier (LEC) network. This paper documents the rationale behind these guidelines. The overall goal was to provide the capability for a call between a mobile user and a land user to have performance equivalent to that of a similar call between two land users. Other factors which were taken into consideration were consistency with existing transmission plans, compatibility with the capabilities of existing facilities and equipment, and flexibility for changes with the introduction of new technology. The actual loss values were based on expected speech power levels, minimizing the variability of losses through the Public Switched Network (PSN), and estimated customer perception of end-to-end voice service.