Phoenix Audio Spider USB and SIP/IP Telephone MT505 - Manual (Page 7)

CONFERENCE CALL (conference a new source into your existing call)
Press the middle function key
Dial the intended number to conference in
Press the middle function key once more to complete the conference
END CALL
Press the button OR the right function key
All grill lights will show solid red for three seconds.
DEVICE MENU
To enter the menu, click on the button. While inside the menu:
ENTER
The button functions as ENTER and will take you one step forward in the menu.
BACK
The Right function key is BACK and will return you one step back in the menu.
EXIT
The button will EXIT the menu and will return you to the Spider’s main display.
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