2N Lift emergency phone 2N SingleTalk - Manual, 1514 v6.3.0 - Manual (Page 72)

List of Terms and Abbreviations 6.2
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6.2 List of Terms and Abbreviations
ST 2N ® SingleTalk
Incoming call A call from the dispatching centre to the central unit
Outgoing call A call from the central unit to the dispaching centre
Checking call An automatically activated call from the central unit to the
dispatching centre
Dispatching
centre A workplace that receives emergency calls, checking calls, and lift
error reports if any. There may be separate workplaces, each for
one type of calls, even mobile ones.
LM, LiftManager 2N TELEKOMUNIKACE dispatcher software
PBX A private branch exchange (equipped with a PSTN line and local
analog lines)
PSTN The public switched telephone network. It is assumed for
simplification that ST is connected to the PSTN although it works
on a PBX line in the same way.