Mitel SX 200 DIGITAL Pabx General Descriptions Manual

Features Description
particular user or group of similar users of the system. Verified Account
Codes can provide restricted access to the system.A/D Converter
See Analog/DigitalAnalog/Digital (A/D)
A term frequently used in transmission technology which implies the
transformation of analog signals (such as normal telephone speech sig-
nals) into their equivalent 
digiral data signals. The device in general use
that performs this transformation is termed an 
A/D Converter. The device
that converts digital...

Glossary of SX-200 DIGITAL TERMS
Associated Modem Line
An Associated Modem Line is a DTE connection to an 5X-200 DIGITAL
PABX by means of a modem which has an associated 
SffPERSET4 or
SUPERSET4DN telephone. The SUPERSETtelephone and the modem can
dial calls independently and can dial calls for each other. The user can con-
duct voice and data calls simultaneously or alternate voice and data on a
trunk call.Asynchronous Mode
In asynchronous data transmission the time between bytes (characters) is...

Features Description
mote end of the trunk, the battery and ground connections are reversed,
opposing the potentials at the remote end and increasing the current sup-
ply to the trunk.
Battery Tone
See Side Tone.
B Channel
The B Channel is the 64K bit channel of a 
DNIC device. It can carry digitized
voice or ASCII characters at a maximum rate of 19.2 
Kb/s.
Blocking
This term describes the condition existing in a switching system when the
immediate establishment of a call is impossible due to...

Glossary of SX-200 DIGITAL TERMS
Circular Hunting
See Group Hunting.
Class of Restriction (COR)
A Class of Restriction controls station and trunk access to trunk circuits. It
performs functions similar to toll control and is programmable on a station
(or trunk) basis.
Class of Service (COS)
A Class of Service has a number of different feature options assigned to it.
This Class of Service may be allotted to one or many 
stations,and enables
these stations to have, or be denied, features which are...

Features Description
Critical Alarm
See Major Alarm.Cross-Connect Field
See Main Distribution Frame.
Customer Data Entry (CDE)
-
Customer Data Entry (CDE) is the process employed when data, particular
to a specific customer installation, is entered into the 
SX-200 DIGITAL
PABX System. This data includes such things as numbering plan, ARS 
rout-
ings, trunk descriptors, etc. CDE is entered into the SX-200 DIGITAL PABX
via the 
MaintenanceKDE terminal.
DCE
See Data Communication Equipment.
DIC
See Digital...

Glossary of SX-200 DIGITAL TERMS
DTR
Data Terminal ready RS-232 pin.
DTRX
Data Transceiver.
DX
This is an abbreviation of the term Digital Crosspoint, the fundamental
switching element of the SX-200 DIGITAL PABX Circuit Switch. The Circuit
Switch is composed of a large number of digital crosspoint switch elements in
the form of DX chips, assembled on a plug-in Circuit Switch module.
Data Communication Equipment
Data Communication Equipment (DCE) interfaces a communications line
or data device to Data...

Features Description
converted from analog to digital signals for transmission (see also Analog/
Digital).
Digital Interface Card
This card interfaces the analog cards in the analog bays to the digital
switching network (the Circuit Switch), and the rest of the system.
Digital Line Interface Circuit
The Digital Line Interface Circuit (DLIC) is a MITEL chip, which is designed
to handle 256 
kbits/s data transmitted between the SX-200 DIGITAL PABX
and high-speed digital synchronous 
DTEs (i.e., the...

Glossary of 5X-200 DIGITAL TERMS
Ground Start
The term used to designate a particular type of trunk circuit, on which a
ground condition is applied to the ring lead of the trunk when an outgo-
ing call seizes the trunk.
Hard Hold
Hard Hold is the term used when a station user, or an attendant, places
another party on hold, and can then perform any of the functions which
are normally available at the station (as opposed to Consultation Hold,
which restricts the functions which can be performed).
Hot...

Features Description
may require the economical aspects to be subordinate to the overall traffic
efficiency requirements of the System; for example, less costly trunk routes
may be available, but offer too low a traffic grade of service for the cus-
tomer’s needs. Actual requirements may be subject to Traffic Analysis of
the customer’s needs.
Loop Start
A form of signaling used by a certain type of CO trunk, which designates
that type of trunk. It denotes an outgoing trunk circuit which is seized by
the...

Glossary of SX-200 DIGITAL TERMS
the internal and external cabling to the PABX. The MDF provides a conve-
nient and flexible means of interfacing the cabling to the system.The MDF
is also known as the Cross-Connect Field.
Maintenance Panel
The Maintenance Panel of the SX-200 DIGITAL PABX allows access to the
maintenance facilities via an RS-232 port and an RJ-11 jack.
Major Aiarm
One of three possible types of alarm priorities, which are the Minor, Major
and Critical Alarms. As the names imply, fault...