Northern Airborne Technology PTA12-0xx - Manual (Page 5)

PTA12-000 POTS Telephone Adapter
SM55-1 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-2
ENG-FORM: 800-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Input Signals
Microphone 150 Ohm amplified dynamic.
250 mVrms rated input level.
Impedance: 150 Ohm
±10%
Circuitry Type Single Ended.
Mic bias +13
±0.5 Vdc (on/off selectable externally)
Output Signals
Phones Rated level: 100 mW into 600 or 150 Ohms
Circuitry Type: Differential
Freq. Resp:
≤3 dB roll-off from 350 to 3000 Hz
Distortion:
≤5% THD @ rated power output
Audio Noise (no signal):
≤ -50 dB from rated output
Available Audio: RX audio, Sidetone, DTMF sidetone
Ringing tone: enabled or disabled externally
Ringer Audio Ringer audio present based on ringing cadence
Level: 2.5 Vrms (typical), 3.6 Vrms (max) into 600 Ohms
Circuitry Type: Single Ended
Ringer Drive Pulled to Power Ground when ringer is active (based on ringing
cadence).
Open collector, 250 mA max sink current @ +28 Vdc.
Over-current and over-voltage protected.
Input / Output Signals
POTS (2 wire) Reverse polarity protected and current limited.
On-hook Condition DC voltage: withstands
±70 Vdc max.
Resistance: 10 to 15 MOhms.
Ringing Condition: Impedance 10 to 15 kOhms @ 25 Hz
Active when ringing signal on tip/ring >30 Vrms @ 25 Hz
Inactive when ringing signal on tip/ring <10 Vrms @ 25 Hz
Ringing Functions Accepts square, trapezoidal or sinusoidal functions
Withstands 120 Vrms (max) 25 Hz sinusoidal function
Off-hook Condition:
Impedance: 600 Ohms
±5% @ 1kHz
Circuitry Type: Balanced
DC loop current: 25 mA (typical) to 120 mA (max)
DC voltage:
≤9.0 Vdc @ 25mA loop current
Frequency Response:
≤3 dB roll-off from 350 to 3000 Hz