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1.6
PICMG* 2.16 Backplane Ethernet Routing
PICMG* 2.16-compliant, in-chassis switches minimize external wiring, thus improving density
and reliability.
As listed in Appendix A under
•
Ports 1-18 correspond to chassis slots 3-20.
•
For each node board, port "A" connects to the switch in slot 2, and port "B" connects to the
switch in slot 21.
•
The switch in slot 2, port 19 connects to CMM1A, and the switch in slot 21, port 19 connects
to CMM1B (refer to the ZT 7102 Chassis Management Module Technical Product
Specification for instructions on enabling the CMM port on the backplane).
•
Link Port "f" provides a link between the switches in slots 2 and 21.
•
Ethernet Fabric boards typically provide uplinks via front- and/or rear-panel connectors.
1.7
N+N Redundant Power Subsystems
The ZT 5085 supports a redundant, scalable power solution, allowing up to eight standard
CompactPCI* 3U x 8HP power supplies.The power supplies are divided into two separate power
subsystems. Each power subsystem supports N+N redundant power supplies and receives input
power from redundant DCor ACinputs. This is critical in Central Office locations where two power
plants deliver redundant DC input into High Availability devices. The two power subsystems in the
ZT 5085 maintain isolation of these inputs (no diode ORing), to ensure that failure of one power
input does not affect the second power input.
1.8
Cooling Architecture
The ZT 5085 platform is designed to cool a maximum of 50 W per slot for the node slots, and 80
W per slot for the fabric slots. It houses three fan trays that are hot swappable, and serviceable from
the front. Each tray spans the distance from front to back of the chassis. Each tray houses three
blowers: one in the front, one in the midsection, and one in the rear. The front and middle blowers
are responsible for cooling the front card cage area, and the rear blower is responsible for cooling
the power supplies and the rear card cage area. The middle blower also provides airflow for the rear
area if a rear blower fails. This combination of three trays with three blowers each provides N+1
redundant cooling for the entire chassis.
Refer to
Chapter 5, "Cooling Subsystem"
architecture.
Technical Product Specification
"Standard Fabric Slot P3/P4/P5 Interfaces" on page
for more information about the ZT 5085's cooling
Introduction
83:
19
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