To adjust the contrast on the display of your Polycom 650 SoundPoint phone to a comfortable level:
or 
soft keys to increase or decrease the display contrast. You can also use the volume keys to increase or decrease the diplay contrast.
The time and date appears on the graphic display of the Polycom SoundPoint IP 650 SIP phone.
If the phone cannot obtain a time and date from the call server, the display will flash. Contact your system administrator if either the time or date is incorrect.
You have control over the format of the time and date display and can turn the Polycom 650 display for time and date off.
To configure the Time and Date:
Scroll through the options under each of these selections using the and keys. Press the 
soft key to confirm your choice. Press Menu or the Exit soft key repeatedly to return to the idle display.
Press the Volume keys to adjust the handset, headset and hands-free speaker volume during a call on your Polycom SoundPoint 650 phone.
Pressing these keys in the idle state adjusts the ringer volume.
Note – To conform to regulatory requirements, handset and headset volume will return to a preset level after each call, but the configuration can be changed by your system administrator.
Hands-free Speakerphone volume settings will be maintained across calls.
To prevent your Polycom 650 phone from ringing on incoming calls:
Press Do Not Disturb button to prevent the phone from ringing on incoming calls. A flashing icon and text on the graphic display indicates that Do Not Disturb is on. Calls received while Do Not Disturb is enabled are logged in the Missed Calls list unless configured to be forwarded to another party by your system administrator.
To disable Do Not Disturb, press Do Not Disturb button again.
Multiple Lines and Do Not Disturb
If multiple lines are configured on your phone, Do Not Disturb can be set on a line-by-line basis from the list using the and buttons.
When Do Not Disturb is enabled for a particular line, this is indicated by a flashing “X” beside the line indicator on the display.
Note – The Do Not Disturb feature is local to the phone, and may be overridden by call server settings. For more information, contact your system administrator.
During a call on your Polycom SoundPoint 650 phone, press the Mute button. The key lights up and a flashing microphone on the graphic display indicates that the other party (or parties) cannot hear you.
Microphone Mute applies to all modes: Handset, Headset, and Hands-free Speakerphone. You can still hear all other parties while mute is enabled.
To turn off Microphone Mute, press Mute button again.
As an option on your Polycom SoundPoint 650 phone, your headset can be permanently enabled. This is especially useful for regular headset users.
To do this:
or arrows and Select soft key to enable Headset Memory Mode.Repeat steps 1 to 4 to select Disabled and turn Headset Memory Mode off.
You can also activate Headset Memory Mode as follows:
Local lists of missed, received and placed calls are maintained by the Polycom SoundPoint 650 phone (up to 100 for each list).
Press Directories button followed by Call Lists, Missed Calls, Received Calls, or Placed Calls as desired.
To manage the listed calls:
For additional choices, press the More soft key followed by:
Press the More and Exit soft keys repeatedly to return to the idle display.
Press 
from the idle display to access the Placed Calls list.
Press 
from the idle display to access the Received Calls list.
Press from the idle display to access the Missed Calls list.
These shortcuts can be used while placing calls or performing transferring and conferencing functions. You can manually clear the call lists. They are automatically cleared when you restart the phone.
You can customize your Polycom SoundPoint 650 phone so that incoming calls from a particular party are transferred directly to a third party.
To divert incoming calls from a particular contact:
and keys to scroll through the list to find the contact that you wish to direct calls directly to your voice mail. You can also use the * key to Page Up and the # key to Page Down. and keys to select Enabled.
You can customize your Polycom SoundPoint 650 phone so that incoming calls from a particular party are immediately sent to your voice mail.
Note – Rejecting calls is not available on shared lines.
To send incoming calls from a particular contact directly to voice mail:
and keys to scroll through the list to find the contact that you wish to direct calls directly to your voice mail. You can also use the * key to Page Up and the # key to Page Down. and keys to select Enabled.
To navigate through menus and to enter data, these are useful tips:
Use and arrows to scroll through the lists.
Press the * key to page up. Press the # key to page down. These shortcuts can be used when lists scroll down beyond a single page.
When menus have submenus, use the and arrows to move one level down and one level up.
Press Menu to exit from any menu.
Press Directories to exit from any directory.
To enter text using the dial pad, press the number keys one or more times.
For example, for ‘A’ press ‘2’ and for ‘C’ press ‘222’. When in text entry mode, the title will show whether keys will generate numbers (1), upper-case (A), or lower-case (a) characters and the 1/A/a soft key can change this.