Dtmf Tone Generation; Dtmf Event Rtp Payload - Polycom SoundPoint IP 301 Administrator's Manual

Administrator Guide - SoundPoint
Silence Insertion Descriptor (SID) frames) and also decodes CN packets, efficiently
regenerating a facsimile of the background noise at the remote end.
Central
(boot
server)
Local

3.3.5 DTMF Tone Generation

The phone generates DTMF tones in response to user dialing on the dial pad. These
tones are transmitted in the RTP streams of connected calls. The phone can encode the
DTMF tones using the active voice codec or using RFC 2833 compatible encoding.
The coding format decision is based on the capabilities of the remote endpoint.
Central
(boot
server)
Local

3.3.6 DTMF Event RTP Payload

The phone is compatible with RFC 2833 - RTP Payload for DTMF Digits, Telephony
Tones, and Telephony Signals. RFC 2833 describes a standard RTP-compatible tech-
nique for conveying DTMF dialing and other telephony events over an RTP media
stream. The phone generates RFC 2833 (DTMF only) events but does not regenerate,
nor otherwise use, DTMF events received from the remote end of the call.
Central
(boot
server)
48
® ®
IP / SoundStation IP
Configuration file: Enable or disable VAD and set the detection threshold.
sip.cfg
•
Web Server None.
(if enabled)
Local Phone User None.
Interface
Configuration file: Set the DTMF tone levels, autodialing on and off times, and
sip.cfg other parameters.
•
Web Server None.
(if enabled)
Local Phone User None.
Interface
Configuration file: Enable or disable RFC 2833 support in SDP offers and spec-
sip.cfg ify the payload value to use in SDP offers.
•
Copyright © 2005 Polycom, Inc.
For more information, see 4.6.1.8.10 Voice Activity
Detection <VAD/> on page 102.
For more information, see 4.6.1.5.1 Dual Tone Multi-
Frequency <DTMF/> on page 85.
For more information, see 4.6.1.5.1 Dual Tone Multi-
Frequency <DTMF/> on page 85.
Features