S E S S I O N I N I T I A T I O N P R O T O C O L ( S I P ) C O N F I G U R A T I O N
V I A W E B
Rev H
151 of 244
OOB RTP Telephone Event Signalling
Send out-of-band telephone
events
When enabled, the VoIP Gateway will send
RFC2833 frames only for the Telephony events.
RFC2833 frames for the DTMF digits are not
supported. The default payload value is 96.
Consult your Call server documentation to learn if
this RFC2833 option is supported and what Payload
value is required.
RFC2833 signalling using
payload value
When enabled, the VoIP Gateway will send
RFC2833 frames only for the Telephony events.
RFC2833 frames for the DTMF digits are not
supported. The default payload value is 96.
Consult your Call server documentation to learn if
this RFC2833 option is supported and what Payload
value is required.
Suppress voice packets during
RFC2833 Telephone Event
packet transmission
Enabling this option preserves the original voice
bandwidth and prevents the need for more bandwidth
for the RFC2833 packets. Consult your Call server
documentation for the preferred mode of operation.
Squelch inband DTMF audio
To enable outband DTMF, select this option. When
selected, inband DTMF audio is not transmitted in the
audio stream.
ABCD event signalling mode
Two possible modes for RFC2833 Telephony events
signaling (ABCD signaling packets) are available:
Transition
mode: In this mode, the event packet is
sent only at the moment of the event.
Continuous
mode: In this mode, the event packet is
sent continuously at the rate of the voice, as long
as the event exists.
The Continuous mode behaves better in situations of
packet loss, preventing cases such as stuck ringers.
Consult your Call server documentation for the
preferred mode of operation.
Play DTMF received via RFC2833
Option to generate DTMF tones for received OOB
RFC2833 DTMF events.
Play DTMF received via SIP info
Option to generate DTMF tones received via the SIP
INFO method.
Call Forward Configuration
Call forward
Gain Control Configuration
Line (input) gain
Headset (output) gain
See
on page
16.3.1 OOB RTP Telephone Event Signalling
RFC2833 describes a protocol for sending Telephony events (Receiver ON/OFF Hook, Ring
ON/OFF) and DTMF digits in RTP packets. This method is used as an alternative method for
the SIP protocol signaling frames to solve a variety of signaling delays. The Payload value is
Payload Type field of the RTP frame. Payloads 0-95 are well defined and reserved values by
IANA. Payloads values of 96-127 are free (dynamic) and are not reserved by the standards.
Summary of Contents for AC - 232 - TX
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