EMC Connectrix B Series Hardware Reference Manual page 135

Glossary
Track Changes A Fabric OS feature that can be enabled to report specific activities
(i.e., logins, logouts, config task changes). The output from the
track-changes feature is dumped to the error log for the switch.
Transceiver Device that converts one form of signaling to another for
transmission and reception. In fiber optics, it refers to optical and
electrical.
Translative Mode A mode in which private devices can communicate with public
devices across the fabric.
Transmission A 10-bit character encoded according to the rules of the 8b/10b
Character algorithm.
Transmission Word A group of four transmission characters.
Trap (SNMP) The message sent by an SNMP agent to inform the SNMP
management station of a critical error. See also SNMP.
Trunking In Fibre Channel technology, a feature that enables distribution of
traffic over the combined bandwidth of up to four ISLs between
adjacent switches, while preserving in-order delivery.
Trunking Group A set of up to four trunked ISLs.
Trunking Ports The ports in a set of trunked ISLs.
TS Time Server.
TTL Time to live. The number of seconds an entry exists in cache before it
expires.
Tunneling A technique for enabling two networks to communicate when the
source and destination hosts are both on the same type of network,
but are connected by a different type of network.
TX
Transmit.
U
U_Port Universal port. A switch port that can operate as a G_Port, E_Port,
F_Port, or FL_Port. A port is defined as a U_Port when it is not
connected or has not yet assumed a specific function in the fabric.
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Connectrix B Series XPath OS AP-7420B Hardware Reference Manual