Administrator’s Guide SoundPoint IP / SoundStation IP

 

Permitted

 

 

Attribute

Values

Default

Interpretation

 

 

 

 

tone.dtmf.viaRtp

0, 1

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.

 

 

 

 

tone.dtmf.rfc2833Control

0, 1

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.

 

 

 

 

tone.dtmf.rfc2833Payload

96-127

101

The phone-event payload encoding in the

 

 

 

dynamic range to be used in SDP offers.

 

 

 

 

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.

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Polycom SIP 2.2.2 manual Be enabled when tone.dtmf.viaRtp is