Northern Airborne Technology PTA12-1xx - Manual (Page 6)

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)