Specifications

Reference Guide 2-13
System Installation System Power and Ground Connections
3. Also make sure jumper JP2 is installed on the card, Figure 2-8. This jumper ensures
electrical compliance with all chassis.
Never remove it for any reason!
4. For a two-sided chassis, remove the panel covering the rear power slots. You may insert
or remove the module in any of the five rear slots. For a front-loading chassis with power
supplies on the side, remove the panel covering the front power slots, and insert or remove
the module in any of the five slots. For a front-loading chassis with power supplies on top,
insert the ringing generator only into slot R1.
5. Hold the ringing generator by the 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.
6. When the power supply is installed and power is on, the LED on the rear panel of the
ringing generator should flicker at a rate of 20 times per second. A problem exists if this
LED is not flickering. Verify that the MASTER/SLAVE jumper settings are correct, and
that the ringing generator is firmly seated in the connector. If so, replace the ringing
generator (it is faulty).
7. Replace the panel cover.
Figure 2-8. 100V Ringing Generator Jumper Settings
2.5 System Power and Ground Connections
After installing the system power cards into the chassis, make the power and ground
connections to the chassis as described in this section. Each chassis has a terminal strip for the
DC voltage, ringing generator, and ground connections.
Power
Bus
Edge
Connector
Slave
Master
JP1
Master/Slave
Jumper
JP2