Features468 System functions and features as of R3.0syd-0367/1.3 – R3.0 – 03.2013• B is external: 30 min• B is in the PISN: can vary in an heterogeneous PISN (system: 45 minutes)Callback to a busy external user B:If user B is a communication server user, he must have his own direct dial numberand his communication server must also support the feature. There are three possi-ble DDI variants:DDI number → user BDDI number → user B + UGDDI number → user B + KTSuffix dialling functionsTab. 272 Callback if user busy: FunctionsNote:Completion of calls to busy is provided on the system phone even if it isnot available. Not available is signalled after activation.System configurationTab. 273 Callback if user busy: System configurationReference to Other Features9. 6. 17. 2 Callback to free userUser A can activate a callback to user B if B does not answer A's call. Since user B ismaking another call (gone off-hook and then back on-hook again), user A is calledwithin 10 s. As soon as A picks up the phone, the system automatically calls user B.Functions System phones Analogue terminalActivate callback R9 or R*37Clear callback #37Parameter Parameter value RemarksNo settingsFeatures:• "Callback to free user", page 468• "Wait until free", page 470• "Message function", page 456
