Installation guide

MMAC-Plus Installation Guide
2
The Backplane
The 9C114 MMAC-Plus provides six distinct backplane buses, and the 9C714
provides an additional seventh bus, the Cell Transfer Matrix. Each bus serves a
particular set of needs. The seven backplane buses are shown in Figure 1.
Figure 1. The MMAC-Plus Backplane Buses
The descriptions of the seven backplane buses are as follows:
System Management Bus 1
The System Management Bus 1, abbreviated SMB-1, is a management bus
devoted solely to transferring management information between the modules in
the chassis. It is through the SMB-1 that modules inform each other, and the
Environmental Module, of their current operating status, diagnostic test results,
initialization queries and other information. The SMB-1 operates at 1 Mbps, and
every module in the chassis has a connection to it.
Cell Transfer Matrix
Inter-Networking Bus B
Inter-Networking Bus A
Flexible Network Bus 2
Flexible Network Bus 1
System Management Bus 10
System Management Bus 1