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Problem Cause/Solution
The base unit (KX-TGP550 only) does not
ring.
• The ringer volume is turned off. Adjust the ringer volume.
For details about the operations, refer to the User Guide
on the Panasonic Web site (® see Introduction).
• Check the VoIP status in the Web user interface and
confirm that each line is registered properly (® see To
check the setting status in the Web user interface in
this section).
• Check that the SIP server address, URLs of the
configuration files, encryption key, and other required
settings are correct.
• Check the firewall and port forwarding settings on the
router (® see 1.1.10 Other Network Settings).
• Check [Multi Number Settings] in the [Telephone] tab in
the Web user interface (® see 3.7.1 Multi Number
Settings).
• Check [Call Control] for each line in the [Telephone] tab
in the Web user interface.
– If [Do Not Disturb] is set to [Yes], the base unit or
handset does not receive calls (® see 3.7.3.3 Call
Features).
– If [Unconditional (Enable Call Forward)] is set to
[Yes], the base unit or handset does not receive calls
(® see 3.7.3.4 Call Forward).
– If [Block Anonymous Call] is set to [Yes], the base
unit or handset does not receive anonymous calls (®
see 3.7.3.3 Call Features).
• Check that [Do Not Disturb], [Enable Call Forward], and
[Block Anonymous Call] are not controlled by your phone
system.
• If 3 calls are being handled by the base unit and/or
handsets simultaneously, a new call cannot be received
and the unit will not ring.
• For details about settings, consult your network
administrator or phone system dealer.
220 Administrator Guide Document Version 2010.03.15
7.1 Troubleshooting