AVT MAGIC TH2, Hardware Manual

Page: 95 / 130

PAGE 95
O p t i o n : D T M F T o n e G e n e r a t o r & A n a l y s e r
8 O P T I O N : D T M F T O N E G E N E R A T O R &
A N A L Y S E R
With the fee-based option DTMF
1
Tone Generator & Analyser Plug-In you
have the possibility to send DTMF tones on the one hand and to analyse
DTMF tones on the other hand.
8.1 DTMF system functions
8.1.1 Sending DTMF tones via the front keypad
DTMF tones can be generated directly via the front keypad of the system by
pressing the numeric keys ’
0
’...’
9
’, ’
*
’, ’
#
’ during a connection (see
CHAPTER 4.3.4).
8.1.2 Sending DTMF tones via the MAGIC TH2 Keypad
The sending of DTMF tones using the MAGIC TH2 Keypad is described on
Page 86. To activate the option for sending DTMF please use the Shift key.
8.1.3 DTMF call initiation via the Audio inputs
You can also initiate a call using DTMF tones via the Audio inputs of the sys-
tem. You simply need to send the DTMF tones from an external DTMF gener-
ator to the Audio input of the MAGIC TH2. To signalise to the system that the
number is complete, you need to send the dialling command via a TTL-Pin
(see Page 58, TTL-Pin as input
→
Connect via DTMF/Accept Call In).
FIG. 59 DTMF CALL INITIATION VIA THE AUDIO INPUTS
1
DTMF = Dual Tone Multi-Frequency
NOTICE
Since the
Shift
key (’
#
’) is used for shifting between the two B channels (only
in
ISDN
operating mode), you must keep the key pressed for 1 second to send
the ’
#
’ DTMF tone.
DTMF
DTMF
via
Audio
Channel 1
DTMF
DTMF
via
Audio
Channel 2
Switch/push button
to
initiate the call