PTA12-000 POTS Telephone Adapter Manual
SM55 Rev. 4.00
Input Current
0.25 Amps max @ +27.5 Vdc.
Backlighting
1.0 mA max @ +27.5 Vdc.
0.1 mA max @ +5.0 Vdc.
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 (typ), 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
Page 1-2
Nov 12, 2003
ENG-FORM: 800-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
