MX2010 MPC Terminology
Regardless of whether you are holding an MPC vertically or horizontally, this information uses the same terms for all four edges of the MPC (see Figure 1):
Faceplate—Edge of the MPC that has connectors into which you insert the SFP or XFP transceivers
Connector edge—Edge opposite the faceplate; this edge has the connectors that attach to the midplane
Top edge—Edge at the top of the MPC when it is vertical
Bottom edge—Edge at the bottom of the MPC when it is vertical
Figure 1: MPC Edges