NEC Univerge SV8100 Features And Specifications Manual page 1298

Issue 12.0
Reverse Voice Over requires a uniquely programmed function key.

If an extension user places a Reverse Voice Over to a busy destination extension, the

system sets up a Voice Over. The Voice Over continues until the Reverse Voice Over key is
pressed again.
When a Reverse Voice Over call is placed to a destination station, while the originator is on

a CO call, the Reverse Voice Over is dropped if the destination station is involved in
another call and this call is terminated.
Default Setting
Disabled
System Availability
Terminals
All Multiline Terminals
Required Component(s)
None
Related Features
Do Not Disturb
Handsfree Answerback/Forced Intercom Ringing
Hotline
One-Touch Calling
Programmable Function Keys
Single Line Telephones, Analog 500/2500 Sets
Voice Over
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UNIVERGE SV8100
Reverse Voice Over