![Poly OBi Series User Manual Download Page 15](http://html1.mh-extra.com/html/poly/obi-series/obi-series_user-manual_1575686015.webp)
Figure 4: VVX 450 hardware features
VVX 450 Hardware Feature Descriptions
Reference
Number
Feature
Feature Description
1
Line keys
Enables you to select a phone line, view calls on a line,
or quickly call a favorite contact.
2
Reversible tab
Secures the handset in the cradle when you position
your phone stand at a high angle. To secure the
handset, remove the tab, reverse it so the protrusion
points up, and reinsert it. Position the handset so the
protrusion on the tab fits into the slot on the handset.
3
Speaker
Provides ringer and speakerphone audio output.
4
Back key
Enables you to return to the previous screen.
5
Transfer key
Transfers an active call to a contact.
6
Messages key
Enables you to access and manage instant and voice
messages.
7
Hold key
Holds an active call or resumes a held call.
8
Volume keys
Adjusts the volume of the handset, headset, speaker,
and ringer.
Getting Started with Polycom VVX Business IP Phones, OBi Edition
14