AMERITECH AM8a, Instruction Manual

Page: 117 / 152

Technical Specifications (18-0037) AM8a Instruction Manual
February 10, 2000 0037-S08.L_
8-2
Line Signaling
Detect and generate all of these line signals:
On Hook
Off hook
Wink
Flash
Unbalance (generate only)
Ringing
Ground Start (tip and ring)
Answer supervision (reverse battery)
EMULATION
User-controlled parameters for circuit emulation. When shown as a range, parameters are
selectable in unit steps, unless otherwise noted.
Digital Ports
Impedance: 100
Ω
at 1.544 megabits-per-second bipolar
PCM
(switches to 1K
Ω
in
DSX
monitor mode)
Analog Office Battery
Voltage: 20 V to 72 V ±2%
Current: 120 mA maximum (not selectable)
Analog Loop
DC Loop Length: 0 to 2100
Ω
, adjustable in 300
Ω
steps
DC Hold Resistance: 10
Ω
, 330
Ω
, 430
Ω
AC Impedance: 135
Ω
, 600
Ω
, 900
Ω
, 1200
Ω
at 300 to 3300 Hz
2.16 µF (IN or OUT). OUT= 24µF
Ringer Load: 2.0 type B ringer equivalents (2 REN)
Ringer Generation
Voltage: 30 Vrms to 105 Vrms ±4% in 5 Vrms steps
Frequency: 15.0 Hz to 70.0 Hz in 0.1 Hz steps
Load: 5.0 ringer equivalents ( 5 REN) maximum. (If no
battery option and AC input is less than 100 Volts,
unit will work with 3 REN or less. Loop Length
must be 1500 ohms or more.)
Ring Trip: below 2100 ohms; 2100 ohm loop length will not
detect ring trip (Loop Closure, answer).