70 InStALLAtIon And opErAtIon mAnuAL 25-13741-E January 2020 www.eaton.com12. Communication12.8 Holding the call at panel handsetOne active call is supported on the system at any particular time. When a panel isactive on a call, any other incoming calls get added to the call list. User can decide tocancel or put on hold the active call to respond to next call.Call can be put on hold by pressing the ‘Hold Call’ key. Navigate the call list to selectnext call. Press ‘Accept Call’ key to start the conversation.To initiate a call from Panel while other calls are placed on hold press ‘Back’ key.Dial the OS number to be called.12.9 Listen-In callListen-in call is a unidirectional call with a type B Outstation. It allows panel to listenthe audio from selected type B outstation. Dial the number of the outstation andpress ‘Listen-In’ to start the call. Press ‘Cancel’ or put the handset down toend the call.12.10 Speak only callSpeak only call is unidirectional call with a type B Outstation. It allows panel totransmit audio to a selected type B outstation. Dial the number of the outstation andpress ‘Speak only’ to start the call. Press ‘Cancel’ or put the handset down toend the call.12.11 Enable inputCalls on the system are disabled when the enable signal is activated. When thesystem is in this state, no dial tone is present on any Outstations. Any attempt tomake a call from Outstations during this period is not registered ignored by panel.System returns to normal operation once the activation is removed.ote:n There will be no impact to any active call present on the system when theinput is activated. Panel will not acknowledge new calls.Figure 42. Symbols for call stateDD/MM/YYHH:MM0102:PANEL XXOUTSTATION 10101:PANEL XXOUTSTATION 1(2-2)DD/MM/YYHH:MM0102:PANEL XXOUTSTATION 10101:PANEL XXOUTSTATION 1(1-2)Handset in placeHandset Off-hookCall incomingCall in progressCall on holdCall disabled