Polycom 1725-11530-310 Administrator's Manual page 183

Attribute
tone.dtmf.viaRtp
tone.dtmf.rfc2833Control
tone.dtmf.rfc2833Payload
Permitted
Values
0, 1
0, 1
96-127
Chord-Sets <chord/>
Chord-sets are the building blocks of sound effects that use synthesized rather
than sampled audio (most call progress and ringer sound effects). A chord-set
is a multi-frequency note with an optional on/off cadence. A chord-set can
contain up to four frequency components generated simultaneously, each
with its own level.
There are three blocks of chord sets:
• callProg (used for call progress sound effect patterns)
• ringer
• misc (miscellaneous)
All three blocks use the same chord set specification format.
Default Interpretation
1 If set to 1, encode DTMF in the active
RTP stream, otherwise, DTMF may be
encoded within the signaling protocol only
when the protocol offers the option.
Note: tone.dtmf.chassis.masking should
be enabled when tone.dtmf.viaRtp is
disabled.
1 If set to 1, the phone will indicate a
preference for encoding DTMF through
RFC 2833 format in its Session
Description Protocol (SDP) offers by
showing support for the phone-event
payload type; this does not affect SDP
answers, these will always honor the
DTMF format present in the offer since
the phone has native support for RFC
2833.
101 The phone-event payload encoding in the
dynamic range to be used in SDP offers.
Configuration Files
A - 29