Ramsey Electronics BS2C Manual de instrucciones descargar pdf (Pagina 24)

DCI2 • 26

DTMF

TONE

J2 Pin 5

(DVMS

DB25-10)

J2 Pin 3

(DVMS

DB25-11)

J2 Pin 1

(DVMS

DB25-12)

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1

Msg # Msg # Msg #

n/a n/a n/a

FUNC-

TION

Msg 1

Msg 2

Msg 3

Msg 4

Msg 5

Msg 6

Msg 7

Msg 8

Play

Stop

J2 Pin 7

(DVMS

DB25-13)

0 (pulse)

J2 Pin 9

(DVMS

DB25-25)

0 (pulse)

DVMS Configuration Outputs

DVMS Configuration

The DVMS configuration is specifically designed to operate in conjunction with

the Ramsey Digital Voice Message System (DVMS) message recorder/player.

You may use this for other purposes but it’s primary purpose is for control of

the DVMS. The table below defines the signals you can expect on J2. Note

that only 1 to 8 and the “#” and “*” DTMF tones are valid for control purposes.

4 to 16 Line Decoder Output

The 4 to 16 line decoder output signals are located on output connector J1.

These signals are active at all times and are independent of the DCI2 configu-

ration. A single line corresponding to the valid DTMF tone is driven low while

the tone is detected. If no valid tone is present all lines are at a logic high. All

lines are open collector logic levels and with a logic 0 being at ground level

and a 1 being an open. A pull-up is required on all outputs. Note that these

are logic levels and can drive simple low current loads such as an LED.

Higher current loads require use of a higher current driver. We have provided

some suggested driver circuits in the “Wiring And Custom Applications Sug-

gestions” section of this manual.

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Ramsey Electronics BS2C Manual de instrucciones Pagina 24

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