SM55 Rev. 4.00
PTA12-000 POTS Telephone Adapter Manual
Section 3.0 Operation
3.1
Introduction
Information in this section consists of the functional and operational procedures for the
PTA12 POTS Telephone Adapter.
3.2 General
The PTA12 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
: The PTA12 is designed to meet standard North American PSTN requirements,
but it is not recommended or approved for landline applications.
3.3 Operation
Specifics
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 Keys
The number (0 - 9) and symbol (
✱
, #) buttons on the keypad are used to ‘dial’ the
required telephone number by generating the corresponding DTMF tone on the POTS
output. As each key 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.
Nov 12, 2003
Page 3-1
ENG-FORM: 806-0105.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
