See overhead information.

A functional part of the common channel signaling system that transfers signaling messages via the message transfer part. Different types of user parts exist (e.g., for telephone and data services), each of which is specified to a particular use of the signaling system. [T1.110-1987]

Protection of information about users from uninvited and possibly illegal access. [T
1. Rpt34-1994]

1. The profile that includes the service profile and contains all the data associated with the user, e.g., incoming call handling information, selection of service provider/service area coverage, service subscriptions, service parameters, etc. [T
1. Rpt34-1994]
2. A description of a user, typically used for access control. [2382-pt.8]
Note: A user profile may include data such as user ID, user… (Read More →)

[A] person authorized by an organization to order COMSEC keying material and interface with the keying system; providing information to key users and ensuring the correct type of key is ordered. [INFOSEC-99]

Synonym class of service.

1. The point of demarcation between a common carrier's facilities and customer's installation, which demarcation establishes both the technical interface and the division of operational responsibility. In this context, "customer" refers to the end-user. [J. Beaty FAA]
2. The term used to refer to the network interface (NI) as well as to interfaces within the customer installation (CI). [T1.640-1996]

An ISDN number, supplied completely or partially by the calling user or the redirecting user, that is associated with the calling user or the redirecting user. The UPN may also be accompanied by a subaddress. [T1.625-1993]

Universal Subscriber Identity Module

United States Naval Observatory