2N Helios IP Configuration Manual v2.7 User Manual
Page 67
67
In-Band (Audio) – enable classic DTMF dual tone receiving in the audio band.
RTP (RFC-2833) – enable DTMF receiving via the RTP according to RFC-2833.
SIP INFO (RFC-2976) – enable DTMF receiving via SIP INFO messages
according to RFC-2976.
QoS DSCP value – set the audio RTP packet priority in the network. The set
value is sent in the TOS (Type of Service) field in the IP packet header.
Jitter compensation – set the buffer capacity for jitter compensation in audio
packet transmissions. A higher capacity improves the transmission resistance at
the cost of a greater sound delay.
Video
Codec 1–4 – set the order of video 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.