Nat PTA12-100 User manual

Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone [phone]
Facsimile [phone]
Issued on the authority of Northern Airborne Technology Ltd.
Copyright 2004
Installation and Operation Manual
PTA12-100
POTS Telephone Adapter
with Display
SM55-2
ISSUE 4.02

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Installation and Operation Manual Page iii
ENG-FORM: 820-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Table of Contents
Section Title Page
1. Description
1.1 Introduction 1-1
1.2 Product Description 1-1
1.3 Design Features 1-1
1.4 Specifications 1-2
1.4.1 Electrical Specifications 1-2
1.4.2 Physical Specifications 1-5
1.4.3 Environmental Specifications 1-6
2. Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3 Continued Airworthiness 2-1
2.4 Installation Procedures 2-2
2.4.1 Warnings 2-2
2.4.2 Cautions 2-2
2.4.3 Cabling and Wiring 2-2
2.4.4 Post-Installation Checks 2-2
2.5 Adjustments and Connections 2-3
2.6 Accessories Required But Not Supplied 2-4
2.7 Installation Drawings 2-4
3. Operation
3.1 Introduction 3-1
3.2 General Information 3-1
3.3 Controls and Indicators 3-2
3.3.1 Display 3-2
3.3.2 Keypad Controls 3-2
3.3.3 Annunciators 3-4
3.4 Name / Number Storage and Display 3-5
3.5 Modes of Operation 3-5
3.5.1 Call Mode 3-5
3.5.2 Recall Mode 3-6
3.5.3 Edit Mode 3-6
3.6 Keypad Function Tables 3-8

PTA12-100 POTS Telephone Adapter with Display
SM55-2 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
PTA12-100 POTS Telephone Adapter with 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 PTA12-100 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.
1.3 Design 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.
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 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.

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-2
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Power Supply Power Input Voltage with reverse, over voltage and over current
protection
Input Voltage
Normal Operation +30.3 Vdc (maximum)
+27.5 Vdc (nominal)
+22.0 Vdc (minimum)
+18.0 Vdc (emergency)
Abnormal Operation +32.2 Vdc (maximum)
+27.5 Vdc (nominal)
+20.5 Vdc (minimum)
Input Current 0.2 Amps max. @ +27.5 Vdc
Lighting 1.0 mA max. @ +27.5 Vdc
1.0 mA max. @ +5.0 Vdc
Input Signals
Microphone 250 mVrms rated input level, amplified dynamic
Impedance 150 Ohm ±10%
Circuitry Type Single Ended
Mic Bias +13 ±0.5 Vdc (selectable via switch)
Key In Used to remotely control the Hook function. Momentarily pull to
Power Ground for a period greater than 500 ms to activate the
Hook function. Momentarily open circuit or apply voltage greater
than 26 Vdc for a period greater than 500 ms to set the Hook to
inactive. Optically isolated and requires 10 mA max source
current.
Output Signals
Rated Level 20 dBm ±3 dB into 600 or 150 Ohms @ 100mW
Circuitry Type Differential
Frequency Response ≤3 dB roll-off from 350 Hz to 3 kHz
Distortion ≤5% THD @ rated power output
Audio Noise ≤-50 dB from rated output (no signal)

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-3
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Available Audio RX audio, Sidetone, DTMF sidetone
Ringing tone (enabled or disabled externally)
RX Audio See RX Audio in the Bidirectional Signals section for rated output
level
Sidetone Rated mic input yields rated phones output with rated TX mic
audio set on TIP/RING and both front panel VOL control and S/T
level potentiometer set to max.
DTMF Sidetone -9 dBm ±3 dB into 600 Ohms
Ringer Audio 14 dBm ±2 dB into 600 Ohms with ringer audio enabled on the
Phones Output (RGR internal switch set to DOWN) and
2.5 Vrms setup on the Ringer Audio Output
Ringer Drive Pulled to Power Ground when ringer is active (based on ringing
cadence)
Open collector, 250mA max sink current @ +28 Vdc
Over-current and over-voltage protected
Key Out When Key In is wired for Hook latching or is tied to Power
Ground, this output is pulled to Power Ground when the Hook
Switch is active
Solid state relay output, optically isolated, 100mA max sink
current @ +28 Vdc
Bidirectional Signals
POTS (2 wire) Polarity insensitive and current limited
On-hook Condition
DC Voltage withstands ±70 Vdc max.
Resistance 10M to 15M Ohms
Ringing Condition
Impedance 10k to 15k Ohms @ 25 Hz
Active when ringing signal on tip/ring >30 Vrms @ 25 Hz
Inactive when ringing signal on tip/ring <10 Vrms @ 25 Hz
Accepts square or sinusoidal ringing functions
Withstands 120 Vrms (max), 25 Hz sinusoidal ringing function
Off-hook Condition
Impedance 600 Ohms @ 1kHz (nominal)
Circuitry Type Balanced
DC Loop Current 25 mA (typical) to 130 mA (max)

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-4
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
DC Voltage ≤9.0 Vdc @ 25 mA loop current
Frequency Response ≤3 dB roll-off from 350 Hz to 3 kHz
Distortion ≤5% THD
Audio Noise ≤-50 dB from rated output (no signal)
Available Audio TX Audio, RX Audio
TX Audio -1 dBm ±1dB into 600 Ohms with <5% THD
(Mic Input to tip/ring) (test condition: 250 mVrms @ 1kHz into Mic input, Mic level
potentiometer set to max.)
RX Audio -20 to 0 dBm
(Typical expected 400 mVrms @ 1kHz RX audio on TIP/RING yields rated phones
audio level) output with both front panel VOL control and RX level
potentiometer set to max.
DTMF Signalling Standard DTMF frequencies used
Frequency Tolerance ±1.5%
Supported Codes 0 – 9, *, #
DTMF TX on tip/ring -2.2 dBm ±1.0 dB into 600 Ohms (DTMF level potentiometer set
to max.)
Serial Port RS232 protocol, RX, TX and GND
Baud Rate 19200
Frame Size 8 bits
Parity none
Stop Bits 1
Flow Control Not available
Annunciators HK and HLD, green LED without dead-front text
LNK and SYS, green LED with dead-front text
HK (Hook Status / Ringer Active)
On Hook LED off
Off Hook LED on
Ringer On LED flashes (0.33 second period @ 50% duty cycle)

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-5
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
HLD (Hold Status)
On Hold LED on
Off Hold LED off
LNK (satcom link)
Link Established LED on
Link Down LED off
SYS (satcom system)
Available for Voice LED on
Busy LED off
1.4.2 Physical Specifications
Height 1.52" (38.6 mm)
Depth 4.17" (105.9 mm) max. behind panel
Width 5.77" (146.6 mm) in front of panel
4.82" (122.4 mm) behind panel
Weight 0.80 lbs (0.36 kg)
Mounting Dzus Mounting (four fasteners)
Front Panel Aluminum with polycarbonate label and elastomeric keypad
Silicone rubber, tactile push-buttons backlit by amber LEDs
Front panel bezel is not backlit
Display 16 5x7 pixel characters with green polarized filter
Material/Finish Chassis & cover are 5052-H32 brushed aluminum with chromate
conversion finish
Connectors One male filtered 25 pin D-submin with Positronics V5 locking
tabs

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-6
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4.3 Environmental Specifications
Temperature -20 to +55°C (operating)
-55 to +85°C (survival)
Altitude 50,000 feet max.
Humidity > 95%
Vibration DO-160D Cat. [(SBM)(UF)]
Qualification of the PTA12-100 POTS Telephone Adapter with Display was completed in accordance with
DO-160D Env. Cat. A1/D1-BAB[(SBM)(UF)]XXXXXXZBABB[UUX]MXXXX.
Note: Tested to DO-160D pre-change 1 and 2.
Section 1 ends

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 2 Rev: 1.01 Issue 4 Page 2-1
ENG-FORM: 805-0121.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 2 Installation
2.1 Introduction
Information in this section consists of unpacking and inspection procedures, installation procedures, post-
installation checks and installation drawings for the PTA12-100 POTS Telephone Adapter with Display.
Review all notes, warnings and cautions.
2.2 Unpacking and Inspection
Unpack the equipment carefully and locate the warranty card. Inspect the unit visually for damage due to
shipping and report all such claims immediately to the carrier involved. Check that all items listed below
are present before proceeding and report any shortage immediately to your supplier:
- Warranty Card
- Operators Manual
- Certificate of Conformity or Release Certification
2.2.1 Warranty
All Northern Airborne Technology Ltd. products are warranted for 2 years from date of installation by an
authorized Northern Airborne Technology Ltd. dealer, to be free of defects in workmanship or
performance. This warranty covers all materials and labour, but is exclusive of any transport to deliver the
defective unit to and from Northern Airborne Technology Ltd. or its designated warranty repair center, or
any labour to remove or re-install the defective unit in the aircraft. Contact Northern Airborne Technology
Ltd. for any questions regarding this warranty, its applicability to your units and/or for return authorization.
Northern Airborne Technology Ltd. is the final arbitrator concerning warranty administration. Units which
have been physically damaged, burned, immersed in water or otherwise abused beyond the scope of
normal use will not be considered for warranty. WARRANTY IS VOID UNLESS THE PRODUCT IS
INSTALLED BY AN AUTHORIZED NORTHERN AIRBORNE TECHNOLOGY LTD. DEALER. Product
for which a warranty card is not returned shall be warranted from date of manufacture.
2.3 Continued Airworthiness
Maintenance of the PTA12-100 POTS Telephone Adapter with Display is ‘on condition’ only. Periodic
maintenance of this product is not required.

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 2 Rev: 1.01 Issue 4 Page 2-2
ENG-FORM: 805-0121.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4 Installation Procedures
2.4.1 Warnings
WARNING:
High volume settings can cause hearing damage.
Set the headset volume control to the minimum volume setting prior to conducting
tests, and slowly increase the headset volume to a comfortable listening level.
2.4.2 Cautions
CAUTION:
Do not take a ground from the instrument panel or similar location that shares a ground
return with a turn and bank, horizon or other motor driven instrument. This may cause the
PTA12-100 unit to pick up the sound of the motor as ground loop interference..
2.4.3 Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer's Maintenance Instructions
or AC43.13-1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify to
MIL-W-22759 as specified in AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11.
For shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves (for shield
terminations) to make the most compact and easily terminated interconnect. Follow the connector map in
Section 2.7 as required.
Allow 3" from the end of the shielded wiring to the shield termination to allow the connector hood to be
easily installed. Reference the interconnect drawing in Section 2.7 for shield termination details.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers
Maintenance Instructions.
Unless otherwise noted, all wiring shall be a minimum of 22 AWG, except power and ground lines, which
shall be a minimum of 20 AWG. Reference the Interconnect drawing for additional specifications. Check
that the ground connection is clean and well secured, and that it shares no path with any electrically noisy
aircraft accessories such as blowers, turn and bank instruments or similar loads.
2.4.4 Post-Installation Checks
2.4.4.1 Voltage/Resistance Checks
Do not attach the PTA12-100 until the following conditions are met.
Check the following:
a) Check P101, pins <1> and <3> for +28 Vdc relative to ground.
b) Check P101, pins <14>, <16> and <19> for continuity to ground (less than 0.5Ω).

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 2 Rev: 1.01 Issue 4 Page 2-3
ENG-FORM: 805-0121.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4.4.2 Power On Checks
Notes: 1. PTA12-100 functionality is highly dependant on the airborne telephone system interface.
Check proper operation of the telephone transceiver, and check that the transceiver has
an activated telephone line.
2. Where the PTA12-100 is connected to an existing audio system, check that the PTA12-100
is properly selected when performing audio checks.
Power up the aircraft’s systems and confirm normal operation of all functions of the PTA12-100. Refer to
Section 3 (Operation) for specific operational details.
a) Initiate a call to a valid telephone number and verify the operation for HOOK, HOLD, DTMF
keys (0 – 9, *, #) and VOL. Re-initiate the call using REDIAL. Test the FLASH function (where
applicable) while in the off-hook state (active).
b) Place the PTA12-100 in the on-hook (inactive) state, and have another party call the line
connected to the PTA12. Confirm proper RINGER, HOOK and HOLD operation.
c) To verify proper operation, all functions and levels shall be checked in-flight.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
2.5 Adjustments and Connections
The following adjustments are accessible through holes in the side of the unit shown in Figure 1.
Figure 1: Adjustments
Rotating the trimpots cw will increase the level of the related output and ccw
will decrease it.
Internal Trimpot Adjustments
LTS adjusts keypad backlighting level from min to max
DTMF adjusts DTMF level on POTS interface
S/T adjusts sidetone level
RX adjusts receive level on phones output
MIC adjusts mic level on POTS interface
RGR adjusts ringer level on both ringer audio and phones output
Internal Switch Settings
RGR on [down] ringer audio available on both phones
(ringer select) and ringer audio outputs
off [up] ringer audio only available on ringer audio
output
FLA / FLB select FLA flash = 90 ms ±40 ms
(hook flash) select FLB flash = 600 ms ±100 ms
MIC on [down] mic bias supplied by PTA12
(
mic bias
)
off
[
u
p]
mic bias not su
pp
lied

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 2 Rev: 1.01 Issue 4 Page 2-4
ENG-FORM: 805-0121.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.6 Accessories Required But Not Supplied
Installation kit p/n D25SV-IKC (crimp) is required to complete the installation. The kit consists of the
following:
Quantity Description NAT Part No.
1 D-min 25 Socket Housing 20-21-025
25 MS Crimp Socket 20-26-901
1 25 Pin JVL Hood/Locklever 20-29-250
2.7 Installation Drawings
DOCUMENT REV. DESCRIPTION TYPE
PTA12-100
PTA12\100\403-0 1.11 POTS Telephone Adapter with Display Interconnect
PTA12\100\403-1 1.11 POTS Telephone Adapter with Display Interconnect
PTA12\100\403-2 1.11 POTS Telephone Adapter with Display Interconnect
PTA12\100\403-3 1.11 POTS Telephone Adapter with Display Interconnect
PTA12\100\403-4 1.11 POTS Telephone Adapter with Display Interconnect
PTA12\100\405-0 1.01 POTS Telephone Adapter with Display Connector Map
PTA12\100\905-0 1.00 POTS Telephone Adapter with Display Faceplate
PTA12\100\922-0 1.10 POTS Telephone Adapter with Display Mechanical Installation
STX100-000
STX100\000\403-6 1.00 STX100 GLOBALSTAR™ Satphone Receiver Interconnect
STX100\000\403-7 1.00 STX100 GLOBALSTAR™ Satphone Receiver Interconnect
Section 2 ends following the above documents