Artesyn ATCA-7480 Installation and Use (February 2015) - Manual (Page 76)

Controls, Indicators, and Connectors
ATCA-7480 Installation and Use (6806800T17A) 76
 SAS update channel
 100Base-BX update channel
Some of the pins provided by P20 and P23 are defined as optional in the AdvancedTCA
specification and are unused on the blade. If the AdvancedTCA specification defines these
signals as input signals, they are terminated on the blade and marked as “TERM_” in the
following pinouts. In all other cases the pins are unconnected and consequently marked as
"n.c.".
The pinouts of P20 and P23 are as follows.
Figure 3-9 P20 Backplane Connector Pinout - Rows A to D