Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
160
23 The Virtual Interfaces TONE, TEST and HTTP
The VoIP Gateway has three virtual interfaces implemented; TONE, TEST and HTTP.
23.1 The Public Dial Tone Interface “TONE”
The TONE interface can be used as a destination for a call. If a call arrives at the TONE
interface, it is not forwarded but the dial tone configured for the interface is played (the
incoming call is acknowledged with SETUP_ACK and a media channel is set up). The call is
rejected if a further digit is dialled or if the original call contained other digits already
dialled.
The TONE interface can be used to play a caller a public dial tone, even though the call has
not yet been connected to a real public exchange line. This happens particularly with least-
cost-routing scenarios, where the call only can be switched when some of the dialled
digits have been analysed.
The TONE interface can process a number of calls simultaneously. The dial tone played is
set in the Analogue/ISDN Interfaces, Tone under Tone provider interface configuration.
23.2 The TEST Interface
The TEST interface is used as a destination for a call. If a call arrives at the TEST interface, it
is connected and the hold music stored in the non-volatile memory is played.
Subsequently dialled digits are ignored.
• Note that:
- The TEST interface can only process calls with G.729A or G.723.
- No music is played for incoming calls with G.711.
- It is not possible to configure this interface.
23.3 The HTTP Interface
The HTTP interface makes it possible to play music, make announcements or provide other
information via an external data source. The configuration is only used in combination
with the PBX Application.