Northern Airborne Technology PTA12-0xx - Manual (Page 17)

PTA12-000 POTS Telephone Adapter
SM55-1 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-1
Section 3 Operation
3.1 Introduction
Information in this section consists of functional and operational procedures for the
PTA12-000 POTS
Telephone Adapter .
3.2 General Information
The PTA12-000 POTS Telephone Adapter is a keypad control unit for airborne telephone system
applications. The PTA12 connects to a telephone system transceiver by a two wire POTS (Plain Old
Telephone Service) interface.
Note: Although the PTA12 is designed to meet standard North American PSTN requirements, it is not
recommended or approved for land line applications.
3.3 Controls and Indicators
3.3.1 Keypad Controls
The keypad controls are silicone rubber, tactile push-buttons, backlit by amber LEDs, and are used to
manage all the operator functions of the PTA12.
3.3.1.1 Number and Symbol Buttons
The number (0 - 9) and symbol (
½, #) buttons on the keypad are used to ‘dial’ the required telephone
number by generating the corresponding DTMF tone on the POTS output. As each button is pressed,
audible confirmation is provided on the sidetone of the headset output.
3.3.1.2 HOOK
Press the HOOK button to initiate or receive a call. This corresponds to lifting the handset of a telephone
‘off the hook’. Each time the HOOK button is pressed, the hook-switch toggles on / off.
The ‘hook status / ringer active’ annunciator is a green LED above the HOOK button. The LED is off
when the unit is inactive (‘on-hook’), and will illuminate continuously when the unit is active (‘off-hook’). If
the unit is inactive (‘on-hook’), this LED also acts as a ‘Ringer Active’ annunciator by flashing when an
incoming call activates the audible ringing tone in the headset. If the unit is already in use (‘off-hook’), the
new caller will generally hear a ‘busy’ signal (depending on the telephone system transceiver used).
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