Polycom SIP 3.1 Dual Tone Multi-Frequency DTMF, Note tone.dtmf.chassis.masking should, disabled

Administrator’s Guide SoundPoint IP / SoundStation IP

Dual Tone Multi-Frequency <DTMF/>

This configuration attribute is defined as follows:

	Permitted
Attribute	Values	Default	Interpretation
tone.dtmf.level	-33 to -3	-15	Level of the high frequency component of
			the DTMF digit measured in dBm0; the
			low frequency tone will be two dB lower.
tone.dtmf.onTime	positive	50	When a sequence of DTMF tones is
	integer		played out automatically, this is the length
			of time in milliseconds the tones will be
			generated for; this is also the minimum
			time the tone will be played for when
			dialing manually (even if key press is
			shorter).
tone.dtmf.offTime	positive	50	When a sequence of DTMF tones is
	integer		played out automatically, this is the length
			of time in milliseconds the phone will
			pause between digits; this is also the
			minimum inter-digit time when dialing
			manually.
tone.dtmf.chassis.masking	0, 1	0	If set to 1, DTMF tones will be substituted
			with a non-DTMF pacifier tone when
			dialing in hands-free mode. This prevents
			DTMF digits being broadcast to other
			surrounding telephony devices or being
			inadvertently transmitted in-band due to
			local acoustic echo.
			Note: tone.dtmf.chassis.masking should
			only be enabled when tone.dtmf.viaRtp is
			disabled.
tone.dtmf.stim.pac.offHookOnly	0, 1	0	Not currently used.

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