ABSTRACT: GR-691 replaces TR-TSY-000691, Issue 1, but contains NO TECHNICAL CHANGES from that original document. It has been issued strictly to
conform with the new Telcordia Technologies document format and GR process, and carries a new issue number and date.
A common need for many anticipated new services is a practical way for a calling subscriber to request those services. For example,
means must be provided for a subscriber to ensure the selection of a data facility on a connection involving a particular service such
as 56-kb/s circuit-switched data. With Facility/Service Selective (FSS) options, a subscriber can dial a Facility Code (FC) and/or a
Service Code (SC) to ensure the selection of a particular facility and/or service on domestic intraLATA (Local Access and Transport
Area) and interLATA calls, and on international calls. This GR describes the view of Telcordia on generic requirements for processing
calls that apply FSS options. The document specifies the FSS dialing procedure and the associated switching and multifrequency
signaling requirements needed to define FSS call processing.