Keyset Self TestDS1000 Hardware Manual Section 4: Optional Equipment ◆ 4-174Keyset Self TestTesting the KeysetUse the following procedure to perform a quick operational test of a keyset.To test a keyset:1. Unplug the telephone line cord.2. While pressing HOLD, plug the telephone back in.All the LED elements in the display will fill.3. Release HOLD.4. Dial 1 to test the green LEDs in the keys.5. Dial 2 to test the red LEDs in the keys.6. Dial 4 to turn the test tone on and off.This test also shows the telephone’s firmware.7. Dial 8 then any other key to test the key.8. Press DND and dial 0 to exit and restart the telephone.