User's Manual

41
Setting up Internet telephony (VoIP)
SX682 WiMAX / engbt / SX682_FUG_EN_9 / Advanced_configuration.fm / 17.5.11
Schablone 2011_04_07
 Enter the access data for your VoIP account that you received from your VoIP pro-
vider. You can normally keep the default settings, unless your provider explicitly
requires other values.
You can enable or disable the following options:
Telephone functions
You can also configure the following telephone functions:
Comfort noise generation
In digital voice transmission, CNG (Comfort Noise Generation) ensures that the
listener hears a slight background noise in the pauses between speech, otherwise
they might think the connection has been lost.
Out-of-band DTMF
With analogue phones, DTMF (Dual-Tone Multi-Frequency, a multi-frequency
dialling system) is used to dial a number or transmit digits during a connection.
There are two kinds of DTMF:
Out-of-band: DTMF digits are transmitted in the voice-frequency band (above
G.711).
In-band: DTMF digits are transmitted through RFC 2833 signalling (e.g.
when retrieving an external voicemail).
Call waiting An incoming call is signalled while you are on the phone (only for
phones on the Phone port).
Call forwarding You can forward incoming calls to another telephone connection.
There are the following possibilities:
Forwarding always: All calls are forwarded at once.
Forwarding on busy: Calls are forwarded if your connection is
busy.
Forwarding on no
response:
Calls are forwarded if the phone is not
answered
Call transfer You can transfer calls to other participants if this feature is available
also for the other participants.
i
Call waiting and Forwarding on busy cannot both be activated in par-
allel.
i
For detailed information on the telephone functions, see section "Making
a phone call or faxing with the SX682 WiMAX" on page 51.