38 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 icon1 appears on the other party’s row on your graphic display. You can optto have voice connections that are no longer secure indicated by a brief alertingtone and a window with the message "Unencrypted call" (see Page 186).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 60)• Voicemail ( Page 46)• Callback ( Page 57)• Group functions ( Page 44)• Multiline ( Page 118)• OpenScape Voice functions ( Page 152)Answering a callThe OpenStage rings. A call is also visually signalled on the call display. The callis also visually signalled on the alert bar.If transmitted, calling party information (name, phone number) appears on thegraphic display.Please read carefully the introductory chapter "Getting to know your Open-Stage phone" Page 14 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 or a ringtone Page 182 on your phone,it is possible that administrator has preset a different pattern melody, pat-tern sequence or ringtone or deactivated the ringtone, depending on thecall type (e.g. an external 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.
