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Model 8664/8665/8668 User Guide
FINDING YOUR WAY
Line Button
The Line button ( ) provides access to four CALL lines (1-4) and one IC line (5).
While the line display is showing, all button presses relate to the line options only.
After you select a line, the line number flashes at the top of the display.
Headset Jack
The Model 8664, 8665, and 8668 endpoints have a headset jack located next to the
charging pins on the bottom of the endpoint. To use a headset, plug the headset con-
nector into the headset jack. Once it is connected, audio is transferred to the headset.
NOTE: Operation of the wireless endpoint may produce an audible noise noticeable to
hearing aid users. It is recommended that a hearing aid-compatible headset be used by
hearing aid users.
LINE