Northern Airborne Technology PTA12-1xx - Manual (Page 24)

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-1
ENG-FORM: 806-0112.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3 Operation
3.1 Introduction
Information in this section consists of functional and operational procedures for the PTA12-100 POTS
Telephone Adapter with Display.
3.2 General Information
The PTA12-100 POTS Telephone Adapter is a keypad control and display unit for airborne telephone
system applications. The PTA12-100 connects to a telephone system transceiver by a two-wire POTS
(Plain Old Telephone Service) interface. The PTA12-100 can be connected to the aircraft audio
controller(s) or directly to an aviation headset/handset.
Note:
The PTA12-100 is designed to meet standard North American PSTN requirements, but it is not
recommended or approved for landline applications.
The PTA12-100 POTS Telephone Adapter is a compact Dzus mounted POTS telephone interface with a
keypad and display. Many of the PTA12-100 functions are controlled by a microcontroller.
The functions of the PTA12-100 include: speech audio circuits, hook switch, ring indication, flash, hold,
redial, serial data communications, backlighting, display, speed dial, Globalstar™ satcom status, DTMF
tone generation and ringer audio generate. The speech audio circuits include a mic input amplifier and a
phones output amplifier with front panel volume control.
Hook switch control and indication is provided on the front panel. The hook switch may be controlled and
its status viewed from a location remote to the PTA12-100 front panel. Ring indication is also provided on
the front panel with a flashing green LED. A FLASH button is provided on the front panel to interrupt the
hook. A HOLD button on the front panel mutes all audio to and from the headset and is indicated by a
green LED. A REDIAL button on the front panel automatically redials the last number called.
The interface to the satcom system transceiver is achieved by a two-wire POTS port. A serial port allows
for data communications to satcom systems.
The front panel keypad has backlighting provided. The display is an LED dot matrix character display with
brightness control.
Speed dial allows numbers to be stored and recalled from memory.
Indication of Globalstar™ satcom signal strength and system availability status is provided by LED lit
dead-front text on the front panel.