Octel XC1000, Service Manual

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GLOSSARY
Gloss-13 Edition One XC1000 Service
ISO (International Standards Organization).
An international agency that is responsible
for developing standards for information exchange. This agency has a function
similar to that of ANSI in the United States.*
IUN (internal user number).
A 16-bit data value used internally by the system to
represent a subscriber mailbox.
J, K, L
Least-significant digit. The rightmost digit of a number.
LED (Light-emitting diode).
A semiconductor diode that emits light when electrical
current is passed through it.
Light-emitting diode (LED). See LED.
Line.
Channel or path for communications between a station and a switch. A general
term often used to describe any type of link or port in a system.
Line card. See DLC.
Line-card slot. A position in the XC1000 card cage where a DLC is inserted.
Link. (1) Process of connecting two or more devices or voice processors. (2) Connection
between specific stages within the same switching system. (3) Address pointer to
the next element of a list or to the next block of a file.
Log. A record that contains entries generated by the voice processor. The entries are
useful for troubleshooting, tracking inconsistencies, and monitoring voice-processor
activity. The log can be viewed or printed using menu 13, option 2 or 3.
Logic card. See card.
Logical terminal number. See LTN.
Login. A combination of numbers and characters that must be entered to access the
data module.
Loop current. Current in the circuit that connects the CO subscriber’s set with the
local switching equipment.
Loop start. Signaling protocol used by PBXs or Centrexes to request dial tone from the
CO by closing the loop (placing a short across the tip and ring).
Low-order nibble. The rightmost character in a hexadecimal byte.
LTN. Identifies the actual trunk in a hunt group chosen by the PBX in response to a
hunt request.
M
Mailbox . (1) Repository of messages for a subscriber on the voice processor from
outside callers or other subscribers. Allows subscribers to exchange messages or
information without being in direct telephone contact. (2) Special mailbox types
allow different functions to be performed.
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* Webster’s Dictionary of Computer Terms, 3rd ed., New York, Simon & Schuster, Inc., 1988.
I–M