SM55 Rev. 4.00 PTA12-100 POTS Telephone Adapter with Display Manual
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
PTA12-100 POTS Telephone Adapter.
3.2 General
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.
3.2.1 Features
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 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.
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.
Sep 21, 2004 Page 3-1
ENG-FORM: 806-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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