Troubleshooting; Table 7-1: Troubleshooting - AudioCodes 420HD User Manual

User's Manual
7

Troubleshooting

Read this section if a problem with your phone occurs. If the 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 the LCD
Phone is not
ringing
'Registration...'
message displayed
on the LCD and
calls cannot be
made or received
LCD display is poor LCD settings
Headset has no
audio
IP Duplication
Version 2.2.8

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 4.9.1)
Ring volume is

set too low
Line not If your phone has multiple lines and an 'X' is displayed
registered to on the LCD for a line, this indicates that the line has
network not been successfully registered. For assistance,
contact your system administrator.
Adjust the phone's screen contrast level (see

Section 4.5)
Adjust the screen's backlight timeout (see

Section 4.6)
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 4.9.5).
Convert the network device with the static IP
Duplicate IP

address to a DHCP client
address conflict
can occur on a
-OR-
DHCP network if
Exclude the static IP address from the DHCP scope

you defined a
on the DHCP server
static IP address
for a network
device
67
7. Troubleshooting
Corrective Procedure
420HD IP Phone