Octel XC1000, Service Manual, Page: 826 / 889

GLOSSARY
Gloss-16 Edition One XC1000 Service
Offset.
Refers to the position of a hexadecimal byte based on the number of bytes
counted from byte zero.
Offset location. Hexadecimal address in a line of code within a 16-byte line, numbered
0 through F. Pertinent to the voice processor’s status log.
On-hook. Term that indicates a piece of telephone equipment is not in use. No loop
current flows when a telephone is on-hook, and the switch recognizes that this
telephone is available for incoming calls.
On-line. (1) Pertaining to equipment or devices directly connected and under control of
the CPU. (2) Mode of voice processor operation intentionally brought about by
maintenance personnel, or by the machine itself, in which certain circuits, units,
or areas are made available for normal operation.
OOS (out-of-service) alarm. An alarm indicating that the voice processor has shut
down and is not processing messages. The alarm indicator appears after the
voice processor has rebooted.
Outband signaling. Signaling that is transmitted on a separate channel from the
channel carrying information (voice, image, or data).
Outcalls.
Method of message-waiting notification. Subscribers can set a notification
schedule so that the voice processor calls the subscriber at a preestablished
number (telephone extension, home telephone number, pager, and so on) to
inform the subscriber of new messages.
Out-of-service alarm.
See OOS alarm.
Outside caller. A person accessing the voice processor who is not a subscriber. A
person accessing the system in a manner that the voice processor does not
recognize as a subscriber.
P, Q
Parallel transmission. In data communications, a method of data transfer in which all
bits representing a character are sent simultaneously.
Parity.
Method of detecting errors in data transmission whereby an extra bit is appended
to each character to make the sum of all bits in the character always odd or even.
See also Serial transmission.
Password. (1) Access numbers from 3 to 15 digits long used for access to the primary
system-manager mailbox and to the secondary system-manager mailbox. These
same passwords allow access to the system-manager terminal. (3) An access
number, 3 to 15 digits long, associated with each mailbox. Subscribers set their
own confidential, personal passwords. No one else (including the system manager)
knows or has access to the subscriber’s password.
PBX (private branch exchange). The telephone switching equipment located in a
business office designed to process incoming, outgoing, and internal telephone
calls.
PCM (pulse code modulation). Method of sampling information signals at regular
intervals and transmitting the samples as a series of pulses in coded form, each
of which represents the amplitude of the information signal at that time.
O–P