Specifications

Glossary
952 Fabric OS Version 3.1.x/4.1.x Reference Guide
CT_HDR
Common Transport Header. A header that conforms to the Fibre Channel Common Transport
(FC_CT) protocol.
CT_IU
Common Transport Information Unit. An information unit that conforms to the Fibre Channel
Common Transport (FC_CT) protocol.
Current Fill Word
The fill word currently selected by the LPSM.
See also fill word, LPSM.
Cut-through
A switching technique that allows the route for a frame to be selected as soon as the destination
address is received.
See also route.
Data Word
Type of transmission word that occurs within frames. The frame header, data field, and CRC all
consist of data words.
See also frame, ordered set, transmission word.
DB-9 connector
A 9-pin version of the RS-232C port interface. May be either the male of female interface.
See also RS-232 port.
dBm
Logarithmic unit of power used in electronics. Indicates signal strength in decibels above the
reference level, which is 1 milliwatt for dBm. An increase of 10 dBm or represents a 10-fold
increase in power.
DCE port
A data communications equipment port capable of interfacing between a DTE (data terminal
equipment) port and a transmission circuit. DTE devices with an RS-232 (or EIA-232) port
interface transmit on pin 3, and receive on pin 2.
See also DTE port, RS-232 port.
Defined Zone Configuration
The set of all zone objects defined in the fabric. May include multiple zone configurations.
See also enabled zone configuration, zone configuration.