the counter reaches zero or the threshold value, a decision is made and/or an event occurs.
token. A sequence of bits passed from one device to another on the token-ring network that signifies permission to transmit over the network. It consists of a starting delimiter, an access control field, and an end delimiter. The access control field contains a bit that indicates to a receiving device that the token is ready to accept information. If a device has data to send along the network, it appends the data to the token. When data is appended, the token then becomes a frame. See frame.
Token Ring. A network with a ring topology that passes tokens from one attaching device (node) to another. A node that is ready to send can capture a token and insert data for transmission.
token-ring network. (1) A ring network that allows unidirectional data transmission between data stations by a token-passing procedure over one transmission medium so that the transmitted data returns to and is removed by the transmitting station. The IBM Token-Ring Network is a baseband LAN with a star-wired ring topology that passes tokens from network adapter to network adapter. (2) A network that uses a ring topology, in which tokens are passed in a sequence from node to node. A node that is ready to send can capture the token and insert data for transmission. (3) A group of interconnected token rings.
twisted pair. A transmission medium that consists of two insulated conductors twisted together to reduce noise.
U
universally administered address. The address permanently encoded in an adapter at the time of manufacture. All universally administered addresses are unique. Contrast with locally administered address.
unshielded twisted pair (UTP). See telephone twisted
pair.
UTP. See unshielded twisted pair (UTP) See also telephone twisted pair.
W
W.Watt.
wire fault. An error condition caused by a break or a short circuit in the cable segment that connects the adapter port to its access unit.
102IBM 16/4 Token-Ring PCI Management Adapter