Northern Airborne Technology PTA12-0xx - Manual (Page 4)

PTA12-000 POTS Telephone Adapter
SM55-1 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-1
ENG-FORM: 800-0115.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
PTA12-000 POTS Telephone Adapter. All derivative product information shall be contained in the
applicable manual supplement, which may be obtained from Northern Airborne Technology Ltd. as
required.
Review all notes, warnings and cautions.
1.2 Product Description
The PTA12-000 POTS Telephone Adapter is a keypad control/headset adapter unit for airborne
telephone system applications. The PTA12-000 connects to a telephone system transceiver by a two-wire
POTS (Plain Old Telephone Service) interface. The PTA12-000 can be connected to the aircraft audio
controller(s) or directly to an aviation headset/handset.
1.3 Design Features
The PTA12-000 POTS Telephone Adapter is compact Dzus mounted POTS telephone interface with a
keypad input. The functions of the PTA12-000 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 PTA12-000 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 nom (with reverse & over voltage/current protection)
Minimum +22.0 Vdc
Maximum +30.3 Vdc
Emergency +18.0 Vdc
Input Current 0.30 Amps max @ +27.5 Vdc.
Backlighting 1.0 mA max @ +27.5 Vdc
0.1 mA max @ +5.0 Vdc