Kontron AT8901M - Manual (Page 38)

AT8901M Hardware Description
Page 3 - 8 AT8901M User Guide
ShMC Cross-connection
The Hub Board provides two dedicated 10/100BASE-T connections to the shelf managers ac-
cording to PICMG 3.0 rev. 2 (redundancy shelf manager cross-connection). Port 0/20 is con-
nected to SMCA, 0/24 to SMCB.
AMC GbE Support Channels
Each AMC bay has one GbE connection to the base interface switch (AMC channel 0). On
channel 1, AMC bay B1 has an additional link to the backplane update channel, thereby pro-
viding a cross-connect to the base switch of the neighbouring, redundant Hub Board.
In applications with a PrAMC used as a system controller in the ATCA Hub Board, the system
controller redundancy ensures that a fault in the base switch of one Hub Board does not cut
the connection to the redundant Hub Board (see block diagram below). The connection be-
tween AMC B1 and the backplane update channel is buffered to allow E-Keying control by the
IPMC. However, E-Keying of the connection from the base switch to the update channel does
not include disabling the LVDS transmitter lines.
Figure 3-2: Block Diagram AMC GbE Cross-connect via update channels
The block diagram shows one solution for the AMC GbE support channels with a PrAMC as
System Controller.