AT&T 3B2/300 Technical Reference Manual page 407

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
CM 193A/B Backplane Board
The CM193A/B is a 4-slot backplane board. The backplane board plugs into the 100-pin (A or J02)
and 60-pin (B or J03) input/output expansion connectors on the system board. A maximum of either
two double-width or four single-width feature cards can be plugged into this backplane. Figure 3-48 is
a functional block diagram of a CMl 93A/B Backplane.
All power, ground, and bus signals for the features cards are from the J02 and J03 system board
connections. Certain bus signals are terminated on the backplane as shown on Figure 3-48. No
connections are provided for the Card Select 15-05 (CS15-05[0]) signals by the CM193A/B
Backplane.
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