TIA ANSI/TIA-664.000-B

This document outlines standard operational procedures proposed for a number of specific features. The particular features included for such description were selected with the following considerations in mind:

• The list of features chosen for operational standardization is restricted to those features that afford the subscriber an acceptable degree of control over common call situations. No attempt is made to "standardize" all of the features that are, may be, or could be made available in the wireless industry. The objective is to provide subscribers with reasonable comfort and familiarity as they move between systems while not infringing on the need of manufacturers and service providers to compete by means of nonstandard offerings.

• All selected features can be implemented, in their "standard" form by MSCs designed to serve smaller markets; i.e., standard procedures should not have unduly burdensome memory and processing capacity requirements. Individual manufacturers may offer "enhanced" versions of standard features; however, such enhancements should not surprise the unsuspecting subscriber by deviations from the standard. Feature options should provide flexibility of the manufacturers' and service providers' offerings.

• The features selected provide as much home service provider control over the feature operation as possible. This is to allow for competition between manufacturers and service providers, while providing seamless feature operation to the subscribers. The mechanisms for these features should allow other home system controlled features to be implemented without sacrificing seamlessness .