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2-10 Reference Guide
Model No.
Running Head
Ringing Generators System Installation
1. . The 890620 may be installed with power applied (“Hot swapping”). The 890620 ring
generator has improved operating efficiency resulting in lower operating temperatures
which promote a longer life expectancy and support of more analog voice ports per ring
generator. It also provides inrush current control during start-up allowing for hot insertion
(plugging) without disrupting the Integrated Access System power supply busses.
2. Make sure jumper W201 is installed if this is the only ringing generator in the unit, if it is
the MASTER ringing generator, refer to Figure 2-5. If this is a SLAVE ringing generator,
cut jumper W201 with wire cutters.
3. Remove the rear panel covering the rear power slots. Insert the ringing generator into slot
R1 or R2.
4. Hold the unit by its metal handle and align the PCB edges with the slot rail guides in the
power supply backplane. Gently push the unit in until it is firmly seated in the backplane
connector.
5. If the power supply is installed and power is on, the LED on the front panel of the ringing
generator should illuminate green. A problem exists if the LED is not illuminated. Verify
that the MASTER/SLAVE settings are correct, and that the unit is firmly seated in the
connector. If so, replace the ringing generator (it is faulty).
6. Replace the panel cover.
Figure 2-5. 105V Ringing Generator Jumper Setting
Power
Bus
Edge
Connector
Slave
Master
JP1
Master/Slave
Jumper
JP2