Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 351)

Access Manager 2000 Manual A-19
U
UAS See Unavailable Second.
UL See Underwriters Laboratory
Unavailable Second Counted for every second in which an Unavailable Signal State occurs.
This term is used by new standards in place of Failed Seconds (FS).
Underwriters
Laboratories A company that tests equipment for electronic safety. If the instrument
passes this company’s tests, it is underwritten and given the “UL” seal.
Unavailable Signal
State An Unavailable Signal State is declared whenever 10 consecutive SESs
occur. The Unavailable Signal State will not clear until 10 consecutive
seconds of data are processed with no SESs present.
Unprivileged
Password An ASCII interface (CRAFT) password that permits an ASCII operator
to perform limited operations on an Access System module.
U, V
User The operator of any device.
Volts Alternating
Current (V
ac
)
An acronym used for labeling the number of volts on an alternating
current. For example: 32 Vac = 32 volts on alternating current.
Volts Direct Current
(V
dc
)
An acronym used for labeling the number of volts on a direct current.
For example: 32 Vdc = 32 volts on direct current.
W, X, Y, Z
Word Length The number of bits or characters in a word, which is usually
determined as a convenient size for processing storages or
transmission. Word length is often based on the register size and
internal operation of a computer.
Term Definition