2N Helios IP Configuration manual v2.6 User Manual
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Audio
Codec 1–4 – set the order of audio codecs for call setup: G.711 (PCMA or
PCMU), L16 or G.729. The order defines the codec priority, i.e. the first codec has
the highest priority. Codec G.729 is available in selected intercoms only with a
valid licence G.729.
The tab below helps you define how DTMF characters shall be sent from the intercom.
Check the DTMF receiving options and settings of the opponent to make the function
work properly.
Sending mode – define whether it will be possible to send DTMF during a call by
pressing 0 through 9, * and # on the intercom numeric keypad. Set the sending
mode for incoming/outgoing/all calls.
In-Band (Audio) – enable classic DTMF dual tone sending in the audio band.
RTP (RFC-2833) – enable DTMF sending via the RTP according to RFC-2833.
SIP INFO (RFC-2976) – enable DTMF sending via SIP INFO messages
according to RFC-2976.
The tab below helps you define how DTMF characters shall be received from the
intercom. Check the DTMF receiving options and settings of the opponent to make the
function work properly.