Zhone Technologies IMACS Network Device - Manual (Page 24)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 20
Model 8905 Power Supply, 120/240 VAC
Input Voltage 90 Vrms to 260 Vrms
Input Frequency 50/60 Hz
Output Power 100W max
Output Voltage -48.0 VDC
Output Current 2 amp
Maximum Number per system 2
Redundancy Optional
Ventilation Convection cooled
Approvals UL 1459, UL 1950, CSA-C22.2 No.950, CE Mark
Model 8908 Power Supply, 105/240 VAC
Input Voltage 90 Vrms to 260 Vrms
Input Frequency 50/60 Hz
Output Power 300 W max
Output Voltage -48.0 VDC
Output Current 6.25 amp
Maximum Number per system 2
Redundancy Optional
Ventilation Forced Air, (120mm Fan)
Approvals UL 1459, UL 1950, CSA-C22.2 No.950
Ring Generator
Ring generators are required to supply ringing current whenever there are Foreign Exchange Station (FXS) Cards
operating in the unit or if there is one or more Foreign Exchange Office (FXO) ports that are used in Manual Ring
Down (MRD) mode.
•
The current ring generator model is: Model 890620
Model 890620,the internal ring generators, will support up to 24 simultaneously ringing phones. Additional ringers
can be added depending on the chassis and application, (see table 5). The exact number of simultaneously ringing
subscriber lines supported is a function of the Bell Ringer Equivalency Number (REN) of the attached devices and
the loop impedance. The user may attach an external ring generator to the IMACS terminal block location marked
RGR.
The model 890620 is an enhanced version of the current 8906 ring generator. This model has improved operating
efficiency and inrush current limiting.
Table —Ring Generator Specifications
Model 890620 Ringing Generator
Input Voltage 42 to 57 VDC, linear = 0.84 max.
Efficiency 57% at 48 V and 1 kOhm load
Protection 5 A slow blow fuse, primary current limiting
Noise Less than 32dBrnc
Output Voltage 100 VDC rms default – adjustable from 60 to 105 Vrms
Output Current 160 mA RMS continuous, 230 mA RMS cadence
Output Frequency 20 Hz +/- 1 Hz
Operational Modes Strap selectable: Master or Slave
Maximum Number per system IMACS 600
IMACS 800
IMACS 900
1
1 Master, 3 slaves (DC operation)
2 slaves (AC operation)
1 Master, 1 slave
Redundancy There is no provision for Master Ringer redundancy, however
the slave units provide fail-over protection