Synonym utility program.

Signals that enable data systems equipment to function correctly, and possibly to provide ancillary facilities. Synonym housekeeping signals.

An entity that contracts for services offered by service providers. [T1.667-1999]

A physical entity that contains the service control function, service data function and the service switching/call control functions. [T1.667-1999]

The set of processes that provide for interaction between a call control function and a service control function. [T1.667-1999]

A physical entity that implements a service switching function. [T1.667-1999]

The last point of service rendered by a commercial carrier under applicable tariffs.
Note 1: The service termination point is usually on the customer premises.
Note 2: The customer is responsible for equipment and operation from the service termination point to user end instruments.
Note 3: The service termination point usually corresponds to the demarcation point.

The term used to describe service continuity, which is supported from the network point of view.

An individual or organization, including a service vendor, that is provided a telecommunications service for which a priority level has been requested or assigned.

is a number from one to five where one has the highest priority for ETS (Legacy GETS, WPS, or NGN-PS) services and five has the lowest priority for ETS (Legacy GETS, WPS, or NGN-PS) services. The Service User’s priority level is assigned to a Service User.