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EMC Connectrix DS-32B2 and ED-12000B Fabric OS Reference Manual
g-7
Glossary
DTE Port A data terminal equipment port capable of interfacing to a
transmission circuit through a connection to a DCE (data
communications equipment) port. DTE devices with an RS-232 (or
(EIA-232) port interface transmit on pin 3, and receive on pin 2 in a
9-pin connection (reversed in 25-pin connectors). See also DCE Port
and RS-232 Port.
DWDM Dense wavelength multiplexing. A means to concurrently transmit
more than one stream of data through a single fiber by modulating
each stream of data on to a different wavelength of light.
E
Edge Switch A switch whose main task is to connect nodes to the fabric. See also
Core Switch.
E_D_TOV Error detect time-out value. The minimum amount of time a target
waits for a sequence to complete before initiating recovery. Can also
be defined as the maximum time allowed for a round-trip
transmission before an error condition is declared. See also
R_A_TOV.
E_Port Expansion port. A type of switch port that can be connected to an
E_Port on another switch to create an ISL. See also ISL.
EE_Credit End-to-end credit. The number of receive buffers allocated by a
recipient port to an originating port. Used by Class 1 and 2 services to
manage the exchange of frames across the fabric between source and
destination. See also End-to-End Flow Control and BB_Credit.
Effective Zone
Configuration
The currently enabled configuration of zones. Only one configuration
can be enabled at a time. See also Defined Zone Configuration and Zone
Configuration.
EIA Rack A storage rack that meets the standards set by the Electronics
Industry Association.
End-to-End Flow
Control
Governs flow of Class 1 and 2 frames between N_Ports. See also
EE_Credit.
Error As applies to Fibre Channel, a missing or corrupted frame, time-out,
loss of synchronization, or loss of signal (link errors).