AudioCodes Mediant 800B User Manual page 1178

Parameter
Second Tx DTMF Option
configure voip > gateway dtmf-supp-
service dtmf-and-dialing > second-
dtmf-option-type
[SecondTxDTMFOption]
configure voip > gateway dtmf-supp-
service dtmf-and-dialing > auto-dtmf-
mute
[DisableAutoDTMFMute]
Enable Digit Delivery to IP
configure voip > sip-definition settings
> digit-delivery-2ip
[EnableDigitDelivery2IP]
Enable Digit Delivery to Tel
configure voip > sip-definition settings
User's Manual

If an ISDN phone user presses digits (e.g., for interactive
voice response / IVR applications such as retrieving
voice mail messages), ISDN Information messages
received by the device for each digit are sent in the voice
channel to the IP network as DTMF signals, according to
the settings of the parameter.

For more information on DTMF transport, see
'Configuring DTMF Transport Types' on page 208.

You can also configure the parameter per specific calls,
using IP Profiles (IpProfile_FirstTxDtmfOption). To
configure IP Profiles, see 'Configuring IP Profiles' on
page 436.
Defines the second preferred transmit (Tx) DTMF
negotiation method. The first preferred method is configured
by the FirstTxDTMFOption parameter. For a description of
the optional values for the parameter, see the
FirstTxDTMFOption parameter above.
Note: You can also configure the parameter per specific
calls, using IP Profiles (IpProfile_SecondTxDtmfOption). To
configure IP Profiles, see 'Configuring IP Profiles' on page
436.
Enables the automatic muting of DTMF digits when out-of-
band DTMF transmission is used.

[0] = (Default) Automatic mute is used.

[1] = No automatic mute of in-band DTMF.
When the parameter is set to 1, the DTMF transport type is
set according to the parameter DTMFTransportType and the
DTMF digits aren't muted if out-of-band DTMF mode is
selected (FirstTxDTMFOption set to 1, 2 or 3). This enables
the sending of DTMF digits in-band (transparent of RFC
2833) in addition to out-of-band DTMF messages.
Note: Usually this mode is not recommended.
Enables the Digit Delivery feature whereby DTMF digits are
sent to the destination IP address after the Tel-to-IP call is
answered.

[0] Disable (default).

[1] Enable = Enable digit delivery to IP.
To enable this feature, modify the called number to include
at least one 'p' character. The device uses the digits before
the 'p' character in the initial INVITE message. After the call
is answered, the device waits for the required time (number
of 'p' multiplied by 1.5 seconds), and then sends the rest of
the DTMF digits using the method chosen (in-band or out-of-
band).
Note:

For the parameter to take effect, a device reset is
required.

The called number can include several 'p' characters (1.5
seconds pause), for example, 1001pp699, 8888p9p300.
Global parameter enabling the Digit Delivery feature, which
sends DTMF digits of the called number to the device's port
1178
Mediant 800B Gateway & E-SBC
Description
Document #: LTRT-10632