Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 361

Figure 7-30 Memory Locations on Cisco Series 12000 Line Cards (Quad OC-3c/
STM-1C POS Card Shown)
Rx DIMM 1
Rx DIMM 2
Before attempting to upgrade line card memory, consult Table 7-4 or Table 7-5 to
determine the particular DIMM module(s) that you will need to achieve the desired
memory configuration.
Table 7-4 lists the available configurations and associated product numbers of DRAM
DIMMs for upgrading processor memory on a line card.
Upgrading Memory on a Line Card
Backplane connector
Maintaining the Cisco 12008 7-81
P4 DRAM bank 1
P4 DRAM bank 2
Tx DIMM 1
Tx DIMM 2
Q OC-3/STM-POS