Technical data

PAGE 89

DTMF Tone Generator & Analyser

7 DTMF TONE GENERATOR & ANALYSER

With the DTMF

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.

7.1 DTMF system functions

7.1.1 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 ’

’...’

’, ’

’ during a connection (see

CHAPTER 4.3.4).

7.1.2 Sending DTMF tones via the b-line XT Keypad

The sending of DTMF tones using the b-line XT Keypad is described on Page

86. To activate the option for sending DTMF please use the Shift key.

7.1.3 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 b-line XT. To signal the system that the number is

complete, you need to send the dialling command via a TTL Pin (see Page 49,

TTL Pin as input

→ Connect via DTMF/Accept Call In).

FIG. 63 DTMF CALL INITIATION VIA THE AUDIO INPUTS

DTMF = Dual Tone Multi-Frequency

NOTE

Since the

Shift

key (’

’) is used for shifting between the two caller lines, you

must keep the key pressed for 1 second to send the ’

’ DTMF tone.

DTMF

via

Audio

Channel 1

DTMF

via

Audio

Channel 2

Switch/push button

initiate the call