Seagate Fibre Channel Interface - Manual (Page 389)

Fibre Channel Interface Manual, Rev. D 375
Initial Relative Offset
A relative offset value specified at the sending end by an upper level for a given block or subblock and used by
the sending FC-2 in the first frame of that block or subblock (see subblock, block, and Relative Offset). Initial
Relative Offset value may be zero or non-zero.
Initialization
For FC-1 level the period beginning with power on and continuing until the transmitter and receiver of that level
become operational.
Initiator
An SCSI device containing application clients that originate device service requests and task management
functions to be processed by a target SCSI device.
Initiator identifier
Token by which a target identifies the initiator device.
Interface connector
An optical or electrical connector which connects the media to the Fibre Channel transmitter or receiver. The
connector consists of a receptacle and a plug.
Intermix
A service which interleaves Class 2 and Class 3 frames on an established Class 1 connection.
Intersymbol interference
The effect on a sequence of symbols in which the symbols are distorted by transmission through a limited
bandwidth medium to the extent that adjacent symbols begin to interfere with each other.
IP
Internet Protocol.
IPA
Initial process associator.
ITV-TS
The International Union–Telecommunication Standardization (formerly CClTT).
IU
Information Unit.
Jitter
Deviations from the ideal timing of an event which occur at high frequencies. Low frequency deviations are
tracked by the clock recovery and do not directly affect the timing allocations within a bit cell. Jitter is not
tracked by the clock recovery and directly affects the timing allocations in a bit cell. For FC-PH the lower cutoff
frequency for jitter is defined as the bit rate divided by 2,500. Jitter is customarily subdivided into deterministic
and random components.