System Backplane - Cisco 7000 Hardware Installation And Maintenance

Description
Nonoperating temperature
Humidity
Agency approvals
The router operates as either a freestanding or rack-mounted unit. An optional rack-mount kit is
available for mounting the chassis in an EIA-310C standard 19-inch equipment rack. When the
system is not mounted in a rack, place it on the floor or on a sturdy platform.
Warning
bodily injury and equipment damage.
The top-down view of the chassis shown in Figure 1-3 illustrates the locations of the main system
components. The arbiter board (which provides CxBus arbitration), LED board, and system blower
are located inside the left front of the chassis behind removable front panels. The blower moves
cooling air through the chassis and across the RP, SP (or SSP), and interface processors to prevent
components on the boards from overheating. The power-supply bays are located next to interface
processor slot 0 and are accessible from the rear of the chassis. An air dam keeps cooling air drawn
in by the system blower separate from that drawn in by the power-supply fans. (Refer to the section
"Power Supplies" in this chapter.)

System Backplane

The high-speed CxBus transfers information at 533 Mbps. Figure 1-4 shows the basic system
architecture. The RP, which contains the system processor, and the SP (or SSP) provide distributed
processing and control for the interface processors. The SP (or SSP) controls communication
between high-speed CxBus interface processors (interface processor-to-interface processor) and the
system processor (interface processor-to-processor).
Specifications
–4 to 149°F (–20 to 65°C)
10 to 90%, noncondensing
Safety: UL 1950, CSA 22.2-950, EN60950, EN41003, AUSTEL TS001, AS/NZS 3260
EMI: FCC Class A, EN55022 Class B, VCCI Class 2
Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe
Physical Description
Product Overview 1-21