Specifications

310HD, 320HD and 420HD IP Phones
4. Press each key on the phone’s keypad; each key that is pressed turns its
corresponding indicator on the LCD screen to the color black.
Figure 39-16: Keypad Test - Keys
5. Continue with the Green-color LEDs test in Section 39.1.3 on page 237.
Administrator's Manual 244 Document #: LTRT-09910