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SETTING UP THE EXPANSION BOARD.

Overview.

The DAC DTMF controller expansion board product consists of a

Printed Circuit Board (PCB) which can be attached to the DAC

range of telephone products which feature an expansion port.

The PCB provides a DTMF decoder and controller which allow a

voltage free contact to be energised.

Pin entry mode.

The product waits for the DTMF tone representing '#' (hash) and

enters PIN entry mode. The loudspeaker on the RA711

(handsfree) telephone is muted (default, see below) while

another four (4) DTMF tones (digits) are entered, which

represent the PIN code, before the loudspeaker is de-muted. A

comparison is made between the four (4) digits entered and the

currently configured PIN code (default 1234, see below) and if

found to be the same the voltage free contact is energised for a

period of two (2) seconds (default, see below). Should entry of

the four (4) PIN digits be interrupted or incomplete then PIN

entry mode is aborted after a period of ten (10) seconds

(default, see below) and the loudspeaker de-muted.

Example (default PIN): # 1 2 3 4 = contact energised for 2

seconds.

The product also features an override mode which can be used to

immediately de-energise the voltage free contact. After entering

the PIN in the normal manner to energise the contact, a second

sequence consisting of a '#' (hash) digit followed by a second '#'

(hash) digit is entered and the contact is immediately de-

energised.

Command mode. [Please note that telephone needs to be off

hook when entering these commands]

The product waits for the DTMF tone representing '*' (star) and

enters command mode. Four (4) commands are available to

allow product configuration, as follows:

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