Siemens Gigaset C450IP - Manual (Page 70)

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Appendix
Gigaset C450 IP / Greek eng / A31008-M1713-T151-3-8U19 / appendix.fm / 24.9.07
Ver
si
on 4, 16.
09.20
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Questions and answers
If you have any questions about using
your phone, visit us at any time at
www.siemens.com/gigasetcustomercare.
The table below contains a list of common
problems and possible solutions.
Please note:
To support the service team, it can be helpful if
you have the following information to hand:
– Version of firmware, EEPROM and your
phone's MAC address
You can check this information with the
Web configurator (page 67). For how to
check the MAC address displayed on your
handset, turn to page 49.
– VoIP status code (page 71)
For problems with VoIP connections, you
should set VoIP status messages to be dis-
played on your handset. (page 48,
page 66). These messages contain a status
code that helps when the problem is ana-
lysed.
The display is blank.
1. The handset is not switched on.
¥
Press and hold the end call key a .
2. The battery is flat.
¥
Charge the battery or replace it
(page 6).
The handset does not respond to a key
press.
The keypad lock is activated.
¥
Press and hold the hash key #
(page 21).
Base flashes in the display.
1. The handset is outside the range of the
base station.
¥
Move the handset closer to the base
station.
2. The base station is not switched on.
¥
Check the base station mains adapter
(page 8).
3. An update of the base station firmware is
currently being conducted (page 46/
page 65).
¥
Please wait until the update is complete.
Please Register flashes in the display.
The handset is not registered.
¥
Register the handset (page 39).
Handset does not ring.
The ringer tone is switched off.
¥
Activate the ringer tone (page 43).
You cannot hear a ring/dialling tone from
the fixed network.
Base station's phone cord has been replaced.
¥
When purchasing a new cord, ensure that it
has the correct pin connections (page 9).
When making calls from the fixed network,
the caller's phone number is not displayed
although CLIP (page 19) is set.
Phone number identification is not enabled.
¥
The caller should ask his network provider
to enable Calling Line Identification (CLI).
You hear an error tone when keying an
input (a descending tone sequence).
Action has failed/invalid input.
¥
Repeat the operation.
Watch the display and refer to the user
guide if necessary.
You cannot connect to the router and the
phone is assigned a static IP address.
¥
Check on the router whether the IP address
is already being used by another device in
the LAN or belongs to the block of IP
addresses that is reserved on the router for
dynamic address assignment.
¥
If necessary, change the phone's IP address
(page 49).
You have made a call via VoIP but cannot
hear the other participant.
Your phone is connected to a router with NAT/
firewall.
¥
Your STUN server or outbound proxy set-
tings are incomplete or incorrect. Check the
settings (page 60, page 60).
¥
No outbound proxy is entered or the out-
bound proxy mode Never is activated
(page 60) and your phone is connected to a
router with symmetric NAT or a blocking
firewall.
¥
Port forwarding is activated on your router,
but no permanent IP address has been
assigned to your phone.