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GLOSSARY 435
bus topology A type of network in which all devices are connected to a single cable. All
devices that are attached to a bus network have equal access to it, and
they can all detect all of the messages that are put on to the network.
byte A unit of 8 bits that forms a unit of data. Usually each byte stores one
character.
call coverage point The user-specified destination for the call forward
feature, that is, how
the system is to handle incoming calls when the user is unable to
answer the telephone.
caller ID A telephone company service that displays the name and number
associated with an incoming call. Also called calling line ID or CLI. See
also CLIR
.
call forward A feature that allows calls to be transferred to a call coverage point
(voice
mail, the Auto Attendant, or a prespecified telephone number) when the
user is unable to answer the telephone.
calling groups A feature that transfers incoming calls to a specified group of telephones.
All telephones ring at the same time. See also hunt groups
.
call park A feature that places a call in a “holding pattern” and makes it available
for others to pick up from any telephone on the system.
call permissions Restrictions that an administrator establishes to control the types of calls
that users can place from their telephones. Can be based on time of day.
call pickup A feature that allows users to retrieve calls that ring on other telephones.
call reports A feature that downloads data about calls and creates simple reports or
exports the data for use in spreadsheets, word processors, or reporting
programs.
category 3 The cable standard for UTP (unshielded twisted pair) voice-grade cabling
that is specified by EIA/TIA 568 for use at speeds of up to 10Mbit/s,
including 10BASE-T
Ethernet.
category 4 The cabling standard specified by EIA/TIA 568 for use at speeds of up to
20Mbit/s, including 16Mbit/s token ring
.
category 5 The cabling standard specified by ElA/TIA 568 for use at speeds of up
to 100 Mbit/s including FDDI (TP PMD), 100BASE-T and
100BASE-VG-AnyLan, and potentially ATM at 155Mbit/s.