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DHY-03 User Handbook
TECHNICAL SPECIFICATION
Remotes
The remote connector is a 9-way female (socket) ‘D’ type. To remotely line connect, connect
pin 1 to pin 2. The action of this remote can act as momentary or latching by pin 6 having
no connection or connecting to 0v respectively.
Pins 3 & 7 is an opto-isolated remote line connect indicator and pins 5 & 7 is an opto-
isolated DTMF detect output. They can utilise the local supply pins 4 & 8 to drive an LED
indicator or a low current load.
Pin 1
: Remote Line Connect Switch
Pin 2
: Common – 0V
Pin 3
: Opto-isolated Line Connect
Indicator NPN emitter
Pin 4
: Common – 0V
Pin 5
: Opto-isolated DTMF Detect
Indicator NPN emitter
Pin 6
: Momentary/Latch Divert switch action (connect to 0v for latching action)
Pin 7
: Opto-isolated Line Connect Indicator NPN collector
Pin 8
: 5volts out (current limited supply for pins 7 & 9)
Pin 9
: Opto isolated DTMF Detect Indicator NPN collector
The remote line connect indicator mimics the front panel line connect button lamp,
i.e. it flashes when ringing and is on when the line is held.
RS232 Serial Port
The serial port allows direct connection to a 9 way ‘D’ type connector on a PC via a pin to pin
cable. See chapter 3 for details about this interface.
Pin 1
: N/C
Pin 2
: TxD
Pin 3
: RxD
Pin 4
: N/C
Pin 5
: Ground
Pin 6
: N/C
Pin 7
: CTS
Pin 8
: RTS
Pin 9
: N/C
Pin 5
Pin 9
Pin 1
Pin 6
Female
Pin 5
Pin 9
Pin 1
Pin 6
Female
TECHNIC
AL SPECIFIC
A
TION
4