2 list of abbreviations – 2N Lift8 v1.6.0 User Manual
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11.2 List of Abbreviations
L8
2N Lift8
®
CU
System central unit, typically shared by multiple lifts in one building.
Splitter
Interconnects audio units and the CU. Each lift shaft has a splitter of its
own.
Audio
unit
Audio unit used for voice communication with the control centre or
another system unit.
System
CU connected with a splitter and group of audio unit.
Main bus
6 wires (power, audio, data) connecting the CU with splitters.
Bus
Double wire connecting the splitter with lift audio unit.
Incoming
call
Call from the control centre to the CU.
Outgoing
call
Call from the CU to the control centre.
Check
call
Call from the CU to the check call line registered in
or
2N Server
®
another number defined.
Triphony
Inter-audio unit communication, typically between all audio units of one
lift, during repairs or rescue operations, for example.
Control
centre
Workplace receiving alarm calls. There can also be separate workplaces
for various call types or just the staff mobile telephones.
DISA
Automatic voice menu for incoming call routing to the required audio unit
or function activation, remote programming, e.g.
PBX
Private branch exchange (equipped with PSTN connection and analogue
local lines).
PSTN
Public telephone network. For simplicity, it is assumed that the CU is
connected to the PSTN but works identically on the PBX line too.
GSM
Global System for Mobile Communications
UMTS
Universal Mobile Telecommunications System
TCP
Transmission Control Protocol is one of the
ST
The
application is intended for remote supervision and
2N Service Tool
®
configuration of
communicators.
2N Lift8
®
CP
The
s intended for the administration of
2N Control Panel
®
application i
users, lifts and authorisations.
CM
(Comm)
The
s intended for receiving alarm calls
2N Communicator
®
application i
by the dispatcher.
SRV
The
rocesses check calls and mediates
2N Server
®
application p
communication between the
s and PC applications.
CU
Validator
This code monitors the values entered in the applications, and in the event
of an error such as excessive length, forbidden character, incorrect format
etc., warns the user.