User Manual HX4E/MX8A Series Voice Gateway
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Transmission modes of DTMF signal supported by the gateways include RFC 2833,
Audio and SIP INFO. The factory default value is RFC 2833.
RFC 2833: separate DTMF signal from sessions and transmit it to the platform
through RTP data package in the format of RFC2833;
Audio: DTMF signal is transmitted to the platform with sessions;
SIP INFO: separate DTMF signal from sessions and transmit it to the platform in
the form of SIP INFO messages.
RFC2833+SIP INFO: sending DTMF signals simultaneously via RFC 2833 and
SIP INFO.
Used with "RFC 2833" in the DTMF transmission modes. The default value of 2833
payload type is 101. The effective range available: 96 ~ 127. This parameter should
match the setting of far-end device (eg. platform).
This parameter sets the on time (in ms) of DTMF signal sent from FXO port. The
default value is 100 ms. The duration time range is 50 ~ 150 ms.
This parameter sets the off time (ms) of DTMF signal sent from port. The default
value is 100 ms. The duration time range is 50 ~ 150 ms.
Min. DTMF
detection duration
Minimum duration time of effective DTMF signal. Its effective range is 32 to 96 ms.
The default value is 48 ms. The greater the value is set, the more stringent the
detection is.
DTMF detection
duration increment
against talk-off
An actual detection threshold is determined jointly by using the Min. DTMF
detection duration and this parameter.
Actual detection threshold = Min. DTMF detection duration + DTMF detection
duration increment against talk-off.
The valid values are 16, 32, and 48 in million seconds. Increase the value can prevent
false detection of DTMF signal.
Table 2-6 Codec Methods Supported by Gateways
Time Intervals of RTP Package Sending (ms)
2.3.5 SIP
After login, click Basic > SIP tab to open the configuration interface.
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