CHAPTER 4. H.323 Gateway Management
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© SAMSUNG Electronics Co., Ltd.
Configuring DTMF Relay
This section describes how to set the method of delivering DTMF tone via
H.323 signaling. To relay DTMF tone, H.323 gateway supports the 4 methods
as follows.
y
inband
y
rtp-nte
y
h245-alphanumeric
y
queued-digits
The inband method delivers DTMF to a voice path without separate
processing. In this case, a distortion may occur due to loss of RTP packets.
The rtp-nte method delivers DTMF tone via RTP according to RFC 2833, RTP
Payload for DTMF Digits, Telephony Tones and Telephony Signals. The
h245-alphanumeric method delivers DTMF tone via H.245
UserInputIndication message
.
The queued-digits method delivers DTMF tone
as RTP packets according to RFC 2833, and Queued Digits are supported for
analog-FXS subscribers.
How to Configure H.323 DTMF Relay
DTMF Relay method can be set for all H.323 calls, or differently for each
dial-peer. To set it for all H.323 calls, follow the procedure below.
y
Configuration Steps
−
configure terminal
−
voice service h323
−
dtmf-relay
−
exit
y
Detailed Steps
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