Polycom SoundPoint IP 600 SIP Administrator's Manual page 67

Administrator Guide - SoundPoint
Attribute
tone.dtmf.viaRtp
tone.dtmf.rfc2833Control
tone.dtmf.rfc2833Payload
4.6.1.3.2 Chord Sets <chord_sets/>
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.
®
IP SIP
Permitted
Values
0, 1
0, 1
96-127
Copyright © 2004 Polycom, Inc
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 telephone will indi-
cate a preference for encoding
DTMF via RFC 2833 format in its
Session Description Protocol (SDP)
offers by showing support for the
telephone-event payload type; this
does not affect SDP answers, these
will always honor the DTMF format
present in the offer since the tele-
phone has native support for RFC
2833.
101 The telephone-event payload encod-
ing in the dynamic range to be used
in SDP offers.
Optimizing SoundPoint
61