Ground start
One of two types of switched trunks (outside lines) typically leased from
telephone companies, the other type being “loop start”. A ground start trunk
initiates an outgoing trunk seizure by applying a local resistance up to 550
ohms from ground to the tip conductor.
Hacker
A person who tries to break into computer or telephone systems, usually by a
series of trial-and-error attempts to break the password.
Key telephone system
A telephone system in which the telephones have multiple buttons that permit
a user to select outgoing or incoming central office phone lines directly.
LED or light
Light-emitting diode. A semiconductor diode that emits light when a current is
passed through it. Used for status and information displays on electronic
devices.
Loop start
One of two types of switched trunks (outside lines) typically leased from
telephone companies, the other type being “ground start”. A loop start trunk is
seized by connecting a low resistance between the tip and ring (both wires) of
the telephone line.
If you need to find out if a line is loop start, call your telephone company.
Off-hook
The telephone is in an off-hook state when the handset is removed from the
cradle. A modem or other device is off-hook when it answers a call or when it
seizes a line to initiate a call.
Public Switched Telephone Network (PSTN)
Usually refers to the worldwide voice telephone network accessible to all those
with telephones and access privileges (i.e., in the U.S., it was formerly called
the Bell System network or the AT&T long distance network.)
Remote
At a location physically removed from the equipment in question, that is, a
computer or PBX system that can be accessed by dialing through the telephone
network.
Appendix 3: Glossary
40-400-00013, Rev.
C
Page 33
