32 Basic functionsBasic functionsSecure voice transmissionPrerequisite: The secure voice communication option must be activated byyour administrator.If you call a party or receive a call from a party over a secure connection, a pad-lock icon appears on the display.1 appears on the other party’s line. You can optto have voice connections that are no longer secure indicated by a brief alertingtone and the message "Unencrypted call" appears on the second line for twoseconds (see Page 178).Emergency modeIf a failover system has been set up for your OpenScape Voice, you can stillmake calls and use the functions of the failover system, for example, despitenetwork faults.If it happens that your telephone is no longer connected to OpenScape Voice, itis registered automatically on the configured failover system. The message"Emergency mode (B8)" then appears on the display.Some functions may not be accessible while in emergency mode, for example:• Call forwarding ( Page 54)• Voicemail ( Page 41)• Callback ( Page 51)• Group functions ( Page 39)• Multiline ( Page 116)• OpenScape Voice functions ( Page 147)Answering a callYour OpenStage phone rings with the tone signal set when an incoming call isreceived.If transmitted, calling party information (name, phone number) appears on thedisplay.Please read the introductory chapter "Getting to know your OpenStagephone" Page 14 carefully before performing any of the steps describedhere on your phone.1. Closed for secure or open for nonsecure voice communicationIf you have set a pattern melody Page 175 on your phone, it is possiblethat administrator has preset a different pattern melody or pattern se-quence or deactivated the ringtone, depending on the call type (e.g. an ex-ternal or internal call).An incoming call will interrupt any ongoing telephone setting operations.When the call ends, you can press the N key to return to the point in themenu structure where you were interrupted.
