Features399System functions and features as of R3.0syd-0367/1.3 – R3.0 – 03.20139. 5. 2 Hold (enquiry call)An A – B connection is put on hold if one of the callers, e.g. user B wants to set upan enquiry call connection with C.Fig. 192 Putting a call on holdDetailed DescriptionTab. 182 Hold (enquiry call)If A is on hold and B hangs up before setting up a ringing or call connection to C, B'sterminal will ring continuously for 10 seconds. As soon as B picks up the handset,he is again connection with A.If A is on hold and B waits for more than 10 seconds before setting up a ringing orcall connection to C, B will obtain the busy tone. The return to the initial connectionis not automatic.Suffix dialling functionsTab. 183 Hold (enquiry call): FunctionsInterface Operating sequence / signalling on the ter-minal ScopeA Music on hold is played to user A, who is onhold1)1) With hold in the public exchange, the signalling depends on the network provider.Possible interfaces:internal, external, PISNC Possible interfaces:internal, external, PISNFunctions System phones Analogue terminalSet up internal enquiry call with or without call prepara-tionR (R = control key)Set up enquiry call to a user of the up-circuitcommunication server.(Requirement: The user’s own communicationserver is analogously connected down-circuitand the existing call connection already seizes atrunk line to the up-circuit communicationserver)via function key with functioncommand "I" to seize the line(macro "I*42")R*42