AudioCodes 405 - 7 Troubleshooting

User's Manual 7. Troubleshooting
Version 2.2.12 59 405 and 405HD IP Phone
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.
Table 7-1: Troubleshooting
Symptom Problem Corrective Procedure
Phone is off
(no LCD displays
and LEDs)
Phone is not
receiving power
 Verify that the AC/DC power adapter is attached
firmly to the DC input on the rear of the phone.

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.
'LAN Link Failure'
message displayed
on the LCD
No LAN
connection
 Verify that the LAN cable is connected securely to
the LAN port on the rear of the phone.
 Verify that the other end of the LAN cable is
connected to the network (switch). If it's not, inform
your system administrator.
Phone is not
ringing
Ring volume is
set too low
 Increase the volume (see Section 4.9.1)
'Registration…'
message displayed
on the LCD and
calls cannot be
made or received
Line not
registered to
network
If your phone has multiple lines and an 'X' is displayed
on the LCD for a line, this indicates that the line has
not been successfully registered. For assistance,
contact your system administrator.
LCD display is poor LCD settings
 Adjust the phone’s screen contrast level (see
Section 4.5)
 Adjust the screen’s backlight timeout (see
Section 4.6)
Headset has no
audio
Headset not
connected
properly

Verify that your headset is securely plugged into the
headset port located on the side of the phone.
 Verify that the headset volume level is adjusted
adequately (see Section 4.9.5).
IP Duplication Duplicate IP
address conflict
can occur on a
DHCP network if
you defined a
static IP address
for a network
device
 Convert the network device with the static IP
address to a DHCP client
-OR-

Exclude the static IP address from the DHCP scope
on the DHCP server