Instruction manual

ACU-1000 Operations Manual
5-10 Interoperability Now
5.8.2 PSTN-2 Specifications
Table 5-3 PSTN-2 Specifications
Telephone Line Interface
2-Wire Audio Interface
Phone line Input/Output Levels
-24 to 0 dBm Programmable in 3 dB steps.
Input/Output Impedance to Phone Line
600 Ω Nominal.
Distortion
Less than 0.5%.
Noise Floor
-65 dBm.
VOX Thresholds
Four selectable VOX thresholds of 19, 16, 13, and 10
dB below input level setting. The default setting is -16
dB (-25 dBm @ -9 dBm level setting, for example)
VOX Hang Time
0.5, 1.0, 1.5, or 2.0 Seconds; Programmable.
Hybrid Balance/Adaptation Speed
-30 dB over 300 to 3200 Hz BW within 1.25 seconds;
measured with white noise source into 600 Ohms.
Ultimate Hybrid Balance
-50 dB typical over 300 to 3200 Hz BW; measured with
a single tone into 600 Ohms.
Hybrid Impedance Matching Capability
0 to infinite ohm complex impedance.
Digital Inputs (/AUXI1, /AUXI 2)
Standard Polarity
Active Low.
Threshold
2.5V nominal.
Input Impedance
47k
Ω
to +5V.
Protection
+100V.
Digital Outputs (/AUXO1, /AUXO2)
Standard Polarity
Active Low.
Type
Open Drain, weak pull-up 47kΩ to +5V.
Maximum Voltage
+60V.
On Resistance
5 Ω nominal.
Maximum Current Sink
50 mA.
General
Front Panel
Monitor, Ring, Connect, VOX, and Fault LEDs.
Rear
60 Pin PC edge connector for backplane.
Input Power
+12V, +Bus Voltage supplied by the backplane.
Size
4HP-Wide Eurocard Module: 5’’H x 0.8’’W x 9’’D.
Weight
1.0 lb. (0.5kg).