Table 5: Midplane Configuration - Juniper G10 CMTS Hardware Manual

Chassis
•
•
•
•
•
•

Table 5: Midplane Configuration

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
24 JUNOSg 3.0 G10 CMTS Hardware Guide
The midplane is partitioned into domains A and B as described in Table 5. This is required by
the bus length restrictions stipulated in the cPCI specification. The power supplies and power
distribution panels are also separated into domains A and B.
Domain Slot
A 1
2
3
4
5
6
B 7
8
B 9
10
11
12
13
Release 3.0 does not support Chassis Control Module
redundancy.
The division of the domains is between slots 6 and 7. Each domain includes up to four
DOCSIS Modules, a NIC Module, and a Chassis Control Module in the front, and up to four
HFC Connector Modules or SIMs, a NIC Access Module, and a Hard Disk Module in the rear.
The number of modules depends on your planned capacity.
The domains are bridged by the Chassis Control Module. Slots 6 and 7 are keyed to accept
only a Chassis Control Module in the front and a Hard Disk Module in the rear. Peripheral
interrupts, clocks, and bus arbitration signals are routed to these system slots. Continuity of
the bus across the midplane is accomplished by the two cPCI buses extending beyond their
system slots to connect with the system slot of the other domain, as shown in Figure 10 on
page 25. The electrical connection of the Chassis Control Module to both buses is controlled
by a PCI-to-PCI bridge in the module.
Front of Midplane
DOCSIS Module
DOCSIS Module
DOCSIS Module
DOCSIS Module
NIC Module
Chassis Control Module
Chassis Control Module
Blank
NIC Module
DOCSIS Module
DOCSIS Module
DOCSIS Module
DOCSIS Module
Rear of Midplane
HFC Connector Module or SIM
HFC Connector Module or SIM
HFC Connector Module or SIM
HFC Connector Module or SIM
NIC Access Module
CCM Access Module
CCM Access Module
Blank
NIC Access Module
HFC Connector Module or SIM
HFC Connector Module or SIM
HFC Connector Module or SIM
HFC Connector Module or SIM