In telephony, any of a number of special functions that may be specified initially, or added to, the user's basic service.
Note: Modern telephone switches are capable of providing a wide variety of service features, such as call forwarding and call waiting.

The information that uniquely identifies an NS/EP telecommunications service to the service vendor and the service user.

Not necessarily specific to one service. [T1.667-1999]

The information that is necessary for the ITF Device to locate and access the content.

Imparts to the user the experience of one seamless, composite service instead of separate services, by way of additional functionality that binds them together.
For example, IPTV and VoIP service where the viewer's IPTV screen displays “Mom“ over the current program and the sound mutes while the incoming call from Mom is delivered to the target device (e.g., house phone).… (Read More →)

The degree to which a service is provided without excessive impairment, once obtained. [NATO]

Imparts to the user the experience of one seamless, composite service instead of separate services, by way of additional functionality that binds them together.
For example, IPTV and VoIP service where the viewer's IPTV screen displays “Mom“ over the current program and the sound mutes while the incoming call from Mom is delivered to the target device (e.g., house phone).… (Read More →)

A sequence of processes/functions used to provide a specific service. [T1.667-1999]

Function to check the layer 4-7 functionality of any device in the home.

The entity equivalent to the work station function between network operators and/or subscribers and network service management functional entities. [T1.667-1999]