on touch-tone phones, where each number is translated and transmitted as an audio tone. The
DTMF format for a call is decided during call setup. There are several types of DTMF:
• Inband DTMF is the most basic form of DTMF, which transmits audio sounds within the audio
stream, heard by participants.
• Out-of-band DTMF transmits messages outside the audio band, and are only converted to
audio at the receiving end. H.323 has several methods of incorporating out-of-band DTMF:
- User Input Indication (UII) is part of the H.245 standard, used in H.323 calls only.
- RFC2833 is the standard method used in SIP calls. However, you have the option to use
this method in H.323 calls as well, provided both endpoints support the standard within H.
323.
You can communicate with the Scopia
®
Elite MCU using any kind of DTMF to display menus and
change layouts.
Before you begin
If configuring from the endpoint, you must first enable advanced configuration, as described in
Enabling Advanced Maintenance on the XT Series on page 112.
Procedure
1. Access the IP settings. From the XT Series web interface, select Administrator Settings >
Calls > Preferences > IP. From the endpoint's main menu, select Configure > Advanced >
Calls > Preferences > IP.
Figure 100: Configuring the DTMF settings in H.323 and SIP calls
2. Set the following fields:
Table 43: Configuring the IP-related call settings
Field Name Description
DTMF RFC2833 (H.323) Select Yes to send DTMF tones in this way for H.323
calls. By default, this is standard for SIP calls and
disabled for H.323 calls, since not all H.323 devices
Table continues…
Configuring Advanced DTMF Settings
April 2015 Avaya Scopia
®
XT Series Deployment Guide 143
Comments? infodev@avaya.com
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