Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Glossary and Abbreviations
GL-6
busy tone
A low-pitched repeating tone that indicates the dialed number is in use.
BX.25
A version of the CCITT X.25 protocol for data communications. BX.25 adds a fourth level to the
standard X.25 interface. This uppermost level combines levels 4, 5, and 6 of the ISO reference
model.
bypass tie trunks
A one-way, outgoing tie trunk from a tandem switch to a main switch in an ETN. Bypass tie trunks,
provided in limited quantities, are used as a last-choice route when all trunks to another tandem
switch are busy. Bypass tie trunks are used only if all applicable intertandem trunks are busy.
byte
A sequence of (usually eight) bits processed together.
C
cabinet
Housing for racks, shelves, or carriers that hold electronic equipment.
call appearance
1. For the attendant console, six buttons, labeled a–f, used to originate, receive, and hold calls. Two
lights next to the button show the status of the call appearance.
2. For a telephone, a button labeled with an extension and used to place outgoing calls, receive
incoming calls, or hold calls. Two lights next to the button show the status of the call appearance.
Call Detail Recording (CDR)
A feature that uses software and hardware to record call data (same as CDRU).
Call Detail Recording utility (CDRU)
Software that collects, stores, optionally filters, and outputs call-detail records.
callback call
A call that automatically returns to a user’s telephone who activated the Automatic Callback or
Ringback Queuing feature.
Call Vectoring directory number
An extension that provides access to the Call Vectoring feature on the switch. Call Vectoring allows
a customer to specify the treatment of incoming calls based on the dialed number.
call-waiting ringback tone
A low-pitched tone identical to ringback tone except that the tone decreases in the last 0.2 seconds
(in the United States). Call-waiting ringback tone notifies the attendant that Attendant Call Waiting is
active and that the called party is aware of the waiting call. Tones in international countries may
sound different.
call-waiting tone
One, two, or three beeps (short bursts of high-pitched tone) that indicate to a busy single-line
telephone that an incoming call is waiting. The type of incoming call determines the number of
beeps the busy telephone receives: one beep indicates that the call is from another telephone in the
system, two beeps indicate that the call is from the attendant or an outside caller, and three beeps
indicate that the waiting call is a priority call.
CAMA
Centralized Automatic Message Accounting