Troubleshooting Guidelines
150 4600 Series IP Telephone LAN Administrator Guide
Telephones. However, rather than displaying messages, the 4601 turns its LEDs on and off to
indicate an error condition, as described in Table 18
’s second column. In addition, not all error
conditions result in unique LED indications.
Table 18: Possible Error Messages During 4601 IP Telephone Installation or
Operation
Error Message 4601 Visual Indication/Cause/Resolution
Extension
Error
VISUAL INDICATION: Message Waiting indicators at top of telephone and
the left middle of the faceplate display a broken flutter for a total of 5 cycles
(with one cycle being alternating 50 milliseconds on, 50 milliseconds off for
500 milliseconds followed by 500 milliseconds off).
CAUSE: The PBX does not recognize the extension entered or cannot find
a valid gatekeeper.
RESOLUTION: Confirm the extension is correct and is correctly
administered on the switch. Then try registration again, taking particular
care to enter the extension accurately.
Extension
in Use
VISUAL INDICATION: If the extension is being used, the 4601 attempts
registration. The first attempt causes the Message Waiting indicators at the
top of telephone and left middle of the faceplate to display a broken flutter.
The broken flutter alternates 50 milliseconds on, 50 milliseconds off for 500
milliseconds, followed by 500 milliseconds off five times. Then the
indicators flash continuously, awaiting user entry. Then the 4601 makes a
second registration attempt using the same extension. This attempt causes
the Message Waiting indicators at the top of telephone and left middle of
the faceplate to display a continuous broken flutter. The broken flutter
alternates 50 milliseconds on, 50 milliseconds off for 500 milliseconds
followed by 500 milliseconds off. In addition, Call Appearance Line b’s LED
flashes continuously until either the “*” or “#” button is pressed.
CAUSE: The PBX detects an extension conflict with an existing set or
Softphone.
RESOLUTION: You can force the current telephone to register, and thereby
disconnect the other user, by pressing #. The 4600 Series IP Telephone
prompts you again for the extension and password. If you enter the same
extension and password, you must confirm that you want to unregister the
original user. Press # to unregister the original user and register the current
telephone. Then press * to reset the telephone and enter a different
extension and password. If you take no action within 20 minutes, the
telephone attempts registration again, repeating the process until either you
intervene or power is lost.
IP Address
in use by
another
VISUAL INDICATION: All LEDs are steadily lit, except Call Appearance
Line A, which is flashing.
CAUSE: The telephone has detected an IP Address conflict.
RESOLUTION: DHCP restart is automatically initiated. No user action
required.
No Ethernet VISUAL INDICATION: No LEDs flash when telephone is plugged in.
CAUSE: Telephone is unable to communicate with the Ethernet.
RESOLUTION: Verify the connection to the Ethernet jack, verify the jack is
Category 5, verify power is applied on the LAN to that jack, etc.
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