Polycom CX5500 Administrator's Guide

Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 317
<tones/>
This parameter describes configuration items for the tone resources available in the phone. It includes:
● <DTMF/>
● <chord/>
<DTMF/>
The parameters listed in the table DTMF Tone Parameters enable you to configure Dual-tone multi-
frequency (DTMF) tone signaling.
DTMF Tone Parameters
Parameter
Permitted Values
Default
tone.dtmf.chassis.masking
1
0 or 1
0
If 0, DTMF tones will be played through the speakerphone in handsfree mode. If 1 (set only if
tone.dtmf.viaRtp is set to 0), DTMF tones will be substituted with non-DTMF pacifier tones when dialing in
handsfree mode—this is to prevent the tones from broadcasting to surrounding telephony devices or being
inadvertently transmitted in-band due to local acoustic echo.
tone.dtmf.level
1
-33 to 3
-15
The level of the high frequency component of the DTMF digit measured in dBm0; the low frequency tone will be
two dB lower.
tone.dtmf.offTime
1
positive integer
50
When a sequence of DTMF tones is 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.onTime
1
positive integer
50
When a sequence of DTMF tones is played out automatically, this is the length of time in milliseconds the tones
will be played for. This is also the minimum time the tone will be played when dialing manually (even if key press
is shorter).
tone.dtmf.rfc2833Control
1
0 or 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
1
96 to 127
127
The phone-event payload encoding in the dynamic range to be used in SDP offers.
tone.dtmf.viaRtp
1
0 or 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: If this parameter is set to 0,
tone.dtmf.chassis.masking should be set to 1.

Polycom CX5500 Specifications

General

Brand	Polycom
Model	CX5500
Category	Conference System
Language	English