Avaya 555-233-784 사용자 설명서

Characters do not appear on the 
Display screen. 

See “

Check all lines into the phone to ensure that it is properly 
connected. 
Check the power source to ensure that your telephone is 
receiving power.
Perform the following Test procedure: with the telephone 
idle (on-hook), press and release the Mute button, then 
press the following numbers on the dialpad: 8 3 7 8 # 
(which stands for TEST). The display should indicate the 
self-test has started, then report if the test was successful 
or failed. If nothing appears on the display, and the phone 
is receiving power, your phone may need to be replaced.
If these suggested solutions do not resolve the problem, 
reset or power cycle the phone with your System 
Administrator’s assistance.

Audio quality is poor, 
specifically, you hear an echo 
while using a handset, static, 
sudden silences (gaps in 
speech), clipped or garbled 
speech, etc.

Various potential network problems may be causing the 
problem.
Access the Network Audio Quality screen (described in 

) to provide your System 

Administrator with specific information related to this 
problem. 
Contact your LAN Administrator with as complete a 
description of the problem as possible.

No dial tone. 

Check that both the handset and line cords into the phone 
are securely connected. Note that there might be a slight 
operational delay if you unplug and reconnect the phone. 
Reset or power cycle the phone with your System 
Administrator’s assistance. (See the section titled 

 for details.)

Contact your System Administrator if the above steps do 
not produce the desired result. 

A feature does not work as 
indicated in this guide (for 
example, the Redial button 
doesn’t operate as described).

Verify the procedure and retry. For certain features, you 
must lift the handset first or place the phone off-hook. 
Contact your System Administrator if the above action 
does not produce the desired result. Your telephone 
system might have been specially programmed for certain 
features applicable only to your installation. 

All other IP Phone problems.

Contact your System Administrator.