Troubleshooting; Table 7-1: Troubleshooting - AudioCodes 440HD User Manual

User's Manual
7

Troubleshooting

Use this section if a problem with your phone occurs. If this section does not facilitate resolving
the issue, contact your system administrator.
Symptom
Phone is off
(no LCD displays
and LEDs)
'LAN Link Failure'
message displayed
on LCD screen
Phone is not ringing Ring volume is set
LCD display is poor
Headset has no
audio
Version 2.0.13B

Table 7-1: Troubleshooting

Problem
Verify that the AC/DC power adapter is attached
Phone is not

firmly to the DC input on the rear of the phone.
receiving power
Verify that the AC/DC power adapter is plugged into

the electrical outlet.
Verify that the electrical outlet is functional.

If using Power over Ethernet (PoE), contact your

system administrator to check that the switch is
supplying power to the phone.
Verify that the LAN cable is connected securely to
No LAN

the LAN port on the rear of the phone.
connection
Verify that the other end of the LAN cable is

connected to the network (switch). If it's not, inform
your system administrator.
Increase the volume (see Section 4.12.1)

too low
Adjust the phone's screen contrast level (see
LCD settings

Section 4.6)
Adjust the screen's backlight timeout (see

Section 4.7)
Verify that your headset is securely plugged into the
Headset not

headset port located on the side of the phone.
connected
properly
Verify that the headset volume level is adjusted

adequately (see Section 4.12.5).
95
7. Troubleshooting
Corrective Procedure
430HD and 440HD IP Phone