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Glossary
connectionless
Nondedicated link. Typically used to describe a link between nodes which allows the switch to
forward Class 2 or Class 3 frames as resources (ports) allow. Contrast this to the dedicated
bandwidth that is required in a Class 1 Fibre Channel Service point-to-point link.
connector
See optical fiber connector.
control processor card
Circuit card that contains the switch microprocessor. The CTP card also initializes hardware
components of the system after power-on. A 10 Mbps RJ-45 twisted pair connector is located
on the CTP card to connect to the Ethernet LAN and communicate with the HAFM server or a
specific management station. Note that the CTP card on this switch is not a FRU.
control unit
A hardware unit that controls the reading, writing, or displaying of data at one or more
input/output units.
control unit port
An internal port on the CTP card that communicates with the attached IBM S/390 or similar
processor channels to report error conditions and link initialization.
CRC
See cyclical redundancy check.
CTP
See control processor card.
CUP
See control unit port.
customer-supplied hub
A device used to connect the HAFM server and the switches it manages.
cyclical redundancy check
System of error checking performed at both the sending and receiving station using the value
of a particular character generated by a cyclic algorithm. When the values generated at each
station are identical, data integrity is confirmed.
DASD
Direct access storage device such as a disk drive.
edge switch 2/16 product manager user guide
Glossary–5
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