AT&T 555-230-894 사용자 설명서

Using the Test Feature

September 1995 Issue 1

E-9

Figure E-8.

Placing the Telephone onto Wall Jack Mounting

Studs

Using the Test Feature

When the telephone is initially powered up, the green light next to the

TEST

button

flashes if the telephone is not (or not yet) able to communicate with the switch.
The light changes to steady green when the switch link is operational. After a
short period of time, the light turns off in order to conserve power.

NOTE:

If the light next to

TEST

does not come on, the telephone is not receiving

power from the switch.

The Test Feature

To test the lights and the display on your telephone:

5. While on-hook, press and hold down TEST.

■

Green light next to TEST goes on.

NOTE:

If the green light next to TEST flashes rather than going on
steadily, it means that the telephone is not able to
communicate with the switch.