Network Card User Manual
Cisco AS5800 Product Overview 1-43
Online Insertion and Removal
The enhanced AC-input power shelf is three rack units high [5.25 in. (13.32 cm)], and mounts
underneath the dial shelf in a standard 19-in., 4-post or telco-type rack assembly.
All cable connections for AC-input power, DC-output power, and status signals are made from the
enhanced AC-input power shelf rear. (See Figure 1-27.) Two modular power cables connect each
AC-input power supply to the site AC-input power source. Two DC-interconnect cables provide
DC-output power to the dial shelf. A monitor cable provides a status signal connection to the dial
shelf filter module maintenance bus (MBus), that monitors voltage tolerance levels, temperature
conditions, and power failure in the enhanced AC-input power shelf. A grounding cable provides a
ground connection from the enhanced AC-input power shelf to the dial shelf.
Figure 1-27 Cisco AS5800 Enhanced AC-Input Power Shelf—Rear View
For detailed specification tables, refer to Appendix A, “Cisco AS5800 Specifications.”
Online Insertion and Removal
The Cisco AS5800 supports online insertion and removal (OIR), which allows you to remove and
replace a dial shelf card while the system is operating, without affecting system operation.
Caution In order to maintain traffic flow in a single dial shelf controller (DSC) configuration, the
DSC shouldn’t be removed while the system is operational. If the DSC is removed, the interconnect
link between the DSC and router shelf will be lost and all other dial shelf cards will go down. The
router console port will display the following message:
AUG 2 10:57:02.017 CST: %DSC_REDUNDANCY-3-BICLINK: Link to active DSC down
Note This section describes the mechanical functions of the system components and emphasizes
the importance of following the correct procedures to avoid unnecessary circuit board failures. This
section is for background information only.
24518
AC-input power
receptacles
Ground post
(chassis ground
does not connect to
+/- studs)
BUS
+
terminal
stud
(-48 volt return)
BUS
-
terminal
stud
(-48 volt input)