IP Phone User's Manual
Table Of Contents
- The handset at a glance
- Base station at a glance
- Contents
- Safety precautions
- Gigaset C450 IP - more than just making calls
- VoIP - Making calls via the Internet
- First Steps
- Menu tree
- Making calls with VoIP and the fixed network
- Operating the handset
- VoIP telephony via the Gigaset.net
- Using the directory and lists
- SMS (text messages)
- Setting handset/base station
- Adjusting the loudspeaker volume
- Setting the ringer volume
- Activating/deactivating advisory tones
- Using the handset as an alarm clock
- Changing the base station system PIN
- Restoring the handset default settings
- Restoring the base station to factory settings
- Setting the default connection
- Assigning the phone a fixed IP address
- Web configurator
- Appendix

5
VoIP – Making calls via the Internet
Gigaset C450 IP / IM-Nord EN / A31008-M1713-R201-3-7643 / starting.fm / 01.03.2007
Version 4, 16.09.2005
VoIP – Making calls via the
Internet
With VoIP (Voice over Internet Protocol),
your calls are not made via a fixed connec-
tion as in the telephone network, but
rather they are transmitted via the Inter-
net in the form of data packets.
You can take advantage of all the benefits
of VoIP with your phone:
u You can make cost-effective calls with
high voice quality with subscribers on
the Internet, the fixed network or the
mobile phone network.
u Your VoIP provider will give you a per-
sonal number, with which you can be
reached from the Internet, the fixed
network and any mobile phone net-
work.
To be able to use VoIP, you need the fol-
lowing:
u A broadband Internet connection
(e.g. DSL) with flat rate or volume-
based price.
u Internet access, i.e. you need a router
that will connect your phone to the
Internet. You can find a list of recom-
mended routers on the Internet at:
http://siemens.com/gigaset
u Access to the services of a VoIP pro-
vider. Open an account with a VoIP pro-
vider.
First Steps
Pack contents
The pack contains:
u one Gigaset C450 IP base station
u one Gigaset C45 handset
u one mains adapter for the base station
u one charging cradle incl. mains adapter
u one phone cord
u one Ethernet cable (LAN cable)
u two batteries
u one battery cover
u one belt clip
u one quick guide
Documentation
A more detailed description of your
Gigaset C450 IP and your Web configura-
tor is available on the Internet at:
www.siemens.com/gigaset
This full description is in PDF format. You
will need Adobe® Reader® to view these
documents. Adobe® Reader® is available
on the Internet at www.adobe.com
.