2N Indoor Talk User Manual page 46

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.
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 length for compensation of interval
unevenness in audio packet arrivals. Set a higher value to increase the receiving
immunity at the cost of a higher sound delay.
2N TELEKOMUNIKACE a.s., www.2n.cz 46/90