1 HV Installation and Operations Guide

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Mb Megabit.

MB Megabyte. (There are 8 bits in a byte.)

MIA An acronym for the media interface adapter plug-ins, which allow you to go

from copper to optical or visa versa.

MIM An acronym for the Media Interface Module.

mapping table A table which is indexed by sequential LUN values, indicating selected

BUS:TARGET:LUN devices. It is used by the 4x50 to perform Fibre Channel-to-

SCSI operations by default.

motherboard The main PCA of the 4x50 that provides a physical and logical connection

between Fibre Channel and SCSI devices.

multicast Refers to delivering a single transmission to multiple destination N_ports.

multiplexer A device that allows two or more signals to be transmitted simultaneously on a

single channel.

N_Port A FC term defining a “Node” port. A FC-defined hardware entity that

performs data communication over the FC link. It is identifiable by a unique

Worldwide Name. It can act as an originator or a responder.

N_Port Identifier A FC term indicating a unique address identifier by which an N_Port is

uniquely known. It consists of a Domain (most significant byte), an Area, and

a Port, each 1 byte long. The N_Port identifier is used in the Source Identifier

(S_ID) and Destination Identifier (D_ID) fields of a FC frame.

narrow SCSI 50-pin SCSI connector; can be single-ended or differential in implementation.

node name A field value under the FC Status menu. The unique FC identifier, a 64-bit

value, the factory assigns to the 4x50.

non-OFC An acronym for Non Open-Ended Fibre Control. This approach does not drop

the laser power when a cable link is dropped. Non-OFC uses a lower power

laser than an OFC system.