subscriber
1. In a public switched telecommunications network, the ultimate user, i.e., customer, of a communications service.
Note 1: Subscribers include individuals, activities, organizations, etc.
Note 2: Subscribers use end instruments, such as telephones, modems, facsimile machines, computers, and remote terminals, that are connected to a central office.
Note 3: Subscribers are usually subject to tariff.
Note 4: Subscribers do not include communications systems operating personnel except for their personal terminals.
2. In cryptography, a party that has a keying relationship with a center or an entity that has a certificate from a certification authority.
3. Also known as customer, account, household, and business. A provider point of view for representing an account eligible for certain Service consumption. A Subscriber can correspond to one or more Users. See also IPTV Subscriber.