SM55 Rev. 4.00
PTA12-000 POTS Telephone Adapter Manual
Section 1.0 Description
1.1 Introduction
This manual contains information on the PTA12 POTS Telephone Adapter.
Information in this section consists of purpose of equipment, features and specifications.
1.2
Purpose of Equipment
The PTA12 POTS Telephone Adapter is a keypad control/headset adapter unit for
airborne telephone system applications. The PTA12 connects to a telephone system
transceiver by a two-wire POTS (Plain Old Telephone Service) interface. The PTA12 can
be connected to the aircraft audio controller(s) or directly to an aviation headset/handset.
1.3
Features
The PTA12 POTS Telephone Adapter is compact Dzus mounted POTS telephone
interface with a keypad input. The functions of the PTA12 include ring detect, ringer audio
generate, DTMF tone generation, speech audio circuits, hook-switch, and flash. The
speech 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. Ring
indication is also provided on the front panel with a flashing green LED. A FLASH key is
provided on the front panel for use with call transfer and call waiting. A HOLD key on the
front panel mutes all audio to and from the headset. A REDIAL key on the front panel
automatically redials the last number entered. The interface to the airborne telephone
system transceiver is achieved by a two-wire POTS port. The front panel keypad is
illuminated for night operations.
Note
: The PTA12 is designed to meet standard North American PSTN requirements,
but it is not recommended or approved for land line applications.
1.4 Specifications
1.4.1 Electrical
Specifications
Power Supply
Voltage: Normal
+27.5 Vdc nominal (with reverse & over voltage/current
protection)
Minimum
+22.0
Vdc.
maximum
+30.3
Vdc.
emergency
+18.0
Vdc
Nov 12, 2003
Page 1-1
ENG-FORM: 800-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
