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Chapter 4
Voice over IP
E-DOC-CTC-20050401-0008 v1.0
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4 Voice over IP
What is Voice over IP Internet telephony or Voice over IP (VoIP) can be defined as the transport of
telephone calls over your Internet connection.
The SpeedTouch™ VoIP
solution
With your SpeedTouch™ you can make Internet and regular telephone calls using
traditional analogue phones, connected to your SpeedTouch™.
Multi-line service Moreover, the voice service on your SpeedTouch™ provides additional lines without
the need for additional copper pairs. The additional lines allow you to make and
receive several internal and external Internet calls simultaneously.
Fax It is also possible to connect a fax machine to your SpeedTouch™, enabling to send
and receive faxes over your Internet connection or over the traditional phone line.
What you need from
your ISP
Following SIP configuration parameters are provided by your ISP:
Uniform Resource Identifier (URI)
User name
Password
IP address and port number (usually 5060) of the provider’s registrar
IP address and port number (usually 5060) of the provider’s SIP proxy server
Uniform Resource
Identifier
The SIP Uniform Resource Identifier (URI) is a unique name used to identify and
locate your telephone. The SIP URI can be in a numerical format or in the format
user@host.
Examples:
3443614
username@hostname.org
username@192.168.10.1
3443614@hostname.org
As VoIP signalling protocol your SpeedTouch™ uses the Session Initiation
Protocol (SIP), defined in RFC 3261.
If your provider gives you an URI in the format containing an ‘@’, your
service provider will tell you whether the ‘@’ can be formed on your phone
by dialing a ‘1’, ‘*’, or ‘#’.