Northern Airborne Technology PTA12-3xx - Manual (Page 4)

PTA12-300 POTS Telephone Adapter with NVIS Display
SM55-3 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-1
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 1 Description
1.1 Introduction
Information in this section consists of product description, design features and specifications for the
PTA12-300 POTS Telephone Adapter with NVIS Display. All derivative product information shall be
contained in the applicable manual supplement, which may be obtained from NAT as required.
Review all notes, warnings and cautions.
1.2 Product Description
The PTA12-300 POTS Telephone Adapter With NVIS Display is a keypad control and display unit for
airborne telephone system applications. The PTA12-300 connects to a telephone system transceiver by a
two-wire POTS (Plain Old Telephone Service) interface. The PTA12-300 can be connected to the aircraft
audio controller(s) or directly to an aviation headset/handset.
Note: The PTA12-300 is designed to meet standard North American PSTN requirements, but it is not
recommended or approved for landline applications.
1.3 Design Features
The PTA12-300 POTS Telephone Adapter is a compact Dzus mounted POTS telephone interface with a
keypad and display. Many of the PTA12-300 functions are controlled by a microcontroller.
The functions of the PTA12-300 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 PTA12-300 front panel. Ring indication is also provided on
the front panel with a flashing green LED. A flash key is provided on the front panel to interrupt the hook.
A hold key on the front panel mutes all audio to and from the headset and is indicated by a green LED. A
redial key on the front panel automatically redials the last number called.
A two-wire POTS port achieves the interface to the satcom system transceiver. A serial port allows for
data communications to satcom systems.
The front panel keypad has NVIS compliant backlighting provided.
The display is an LED dot matrix character display with brightness control.
The display is filtered for NVIS radiance requirement.
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.