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Glossary
300 Web Tools Version 3.1.x/4.1.x User Guide
Transceiver
Device that converts one form of signaling to another for transmission and reception; in fiber
optics, it refers to optical and electrical.
Transfer State
The state in which a port can establish circuits with multiple ports without reentering the
arbitration cycle for each circuit. This state can only be accessed by an L_Port in the Open state.
Translative Mode
A mode in which private devices can communicate with public devices across the fabric.
Transmission Character
A 10-bit character encoded according to the rules of the 8B/10B algorithm.
Transmission Word
A group of four transmission characters.
See also data word.
Trap (SNMP)
The message sent by an SNMP agent to inform the SNMP management station of a critical error.
See also SNMP.
Trunking
See ISL Trunking.
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.
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.
UDP
User Datagram Protocol. A protocol that runs on top of IP and provides port multiplexing for
upper-level protocols.
ULP_TOV
Upper-level Time-out Value. The minimum time that a SCSI ULP process waits for SCSI status
before initiating ULP recovery.