"GENERAL This is one of a series of recommendations entitled: ""CELLULAR RADIOTELECOMMUNICATIONS INTERSYSTEM OPERATIONS"" which describe procedures necessary to provide to cellular radio telephone subscribers certain services requiring interaction between different cellular systems. It is the intention of EIA Subcommittee TR45.2@ Cellular System Operation@ that this series of recommendations be a vehicle which will address the ongoing and developing concerns of the Cellular Radio Telecommunications Industry -- subscribers@ service providers and manufacturers alike with regard to useful and effective services requiring standardized intersystem procedures."