Configuration
3.3
65
Caution
Wrong settings may deteriorate the transfer quality. Do not change this
parameter if you are not sure. The change in transfer quality will show
only in case the network components support this service.
Figure 3.24
Audio Codec Settings
DTMF receiving and Sending
Defines how DTMF signalling should be received and sent. The 2N
®
Helios IP DTMF
signalling is sent if the
Send during call
parameter is selected. Check the opponent‘s
parameters for correct settings.
1.
Receive as audio / Send as tones – transmits the DTMF signals in the audio
channel. This setting is unsuitable for cases where the audio channel is
comprised using high-compression codecs such as GSM codecs.
2.
Receive as RTP / Send as RTP – transmits DTMF signalling as special RTP
packets according to the RFC2833 recommendation.
3.
Receive as SIP INFO / Send as SIP INFO – transmits DTMF signalling using
the SIP INFO packets as recommended in RFC2976.
Содержание Helios IP
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