Cisco SRS Series Installation Manual page 29

Overview
Figure 6: Rear (MSC) Side Slot Numbers
The components on the rear (MSC) side of the chassis include:
• Top fan tray (FT0)
• Upper card cage, eight MSC slots (left to right: 7, 6, 5, 4 and 3, 2, 1, 0) spaced around four switch fabric
card slots (SM0, SM1, SM2, and SM3)
• Lower card cage, eight MSC slots (left to right: 15, 14, 13, 12 and 11, 10, 9, 8) spaced around four switch
fabric card slots (SM4, SM5, SM6, and SM7)
• Lower fan tray (FT1)
The MSC slot numbers are reversed from the PLIM slot numbers on the other side of the chassis. Because an
MSC is associated and actually mates through the midplane with a PLIM, MSC slot 0 is on the far right side
of the chassis looking at it from the rear (MSC) side; PLIM slot 0 is on the far left side of the chassis looking
at it from the front (PLIM) side. MSC slot 0 and PLIM slot 0 mate with each other through the midplane, and
so do all other MSC and PLIM slots (2 through 15).
Note Any line card (MSC, FP, or LSP) can be inserted into an MSC slot.
Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
Chassis Slot Numbers
9