EMC Connectrix DS-32B2 and ED-12000B Fabric OS Reference Manual g-19
Glossary
Terminal Serial Port The lower serial port on the CP card. Receives error messages. Can be
used to connect the CP card to a computer terminal. Has a DB-9
connector wires as a ttyS0 DTE device, and can be connected by serial
cable to a DCE device. The connector has pins two and three
swapped so that a straight-through cable can be used to connected to
a terminal. See also DB-9 Connector, DCE Port, and Modem Serial Port.
Throughput The rate of data flow achieved within a cable, link, or system. Usually
measured in bps (bits per second). See also Bandwidth.
Topolog y As applies to Fibre Channel, the configuration of the Fibre Channel
network and the resulting communication paths allowed. There are
three possible topologies:
•Point-to-point — A direct link between two communication ports.
•Switched fabric — Multiple N_Ports linked to a switch by
F_Ports.
•Arbitrated loop — Multiple NL_Ports connected in a loop.
Transcei ver Device that converts one form of signaling to another for
transmission and reception. In fiber optics, it refers to optical and
electrical.
Transmission
Character A 10-bit character encoded according to the rules of the 8b/10b
algorithm.
Transmission Word A group of four transmission characters.
Trap (SN MP) The message sent by an SNMP agent to inform the SNMP
management station of a critical error. See also SNMP.
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
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.