Format:Patthehookand*+extensionnumber
Description:Allowsyoutoaddathirdparttoatwo-partsconversationandmakeathree-
partsconference.YoucanhaveonlytwoextensionswithoneC.O.Line.
Operation:Patthehookandpress##
Theoccupyingexteriorlinecanbereversedbyexchanger.Thenanotherexteriorline
canbetransferredortalkedbyinterphone,whichcansolvetheproblemthattheincoming
callwaitslongforansweringorevennoanswer.Thereforethefunctionoftheexchangeris
largelyextended.
Operation:*+Extensionnumber
Description:Makeinternalcallbetweenextensionswithdirectoutwardmode.
Operation:Dialtheextensionnumberdirectly.
Remark:Intercomcallingisfreeofcharge.
TheexteriordurationtimeofC.O.Linecallholdingis2minuters.
Operation:*0(atdirectoutwardmode)
0atindirectoutwardmode)(
Operation:*#60(atdirectoutwardmode)
ThenumberofDUDUtoneindicatetheextensionnumber.
Extensionnumberquery(ThroughDUDUtone)