1-5
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter1 Product Overviews
How this Chapter Is Organized
Note The information in this guide does not apply to the Cisco MGX 8850 (PXM1), which uses the PXM1
controller card and Release 1.X software.
For documentation on Cisco MGX Release 1.x software and hardware, refer to
http://www.cisco.com/univercd/cc/td/doc/product/wanbu/mgx8850/index.htm.
Multiple Terms
Inside and outside of Cisco, several terms are often used for the same thing. Here are some examples:
•MGX switches contain printed circuit cards called front cards and back cards. Cards are also called
blades, modules, or boards. A controller card is sometimes simply called a controller. In this guide,
the terms module is used for a front card and card is used for every other type of card.
•An interconnect device that enables redundant operation between cards is called a midplane, a n
automatic protection switching (APS) backplane connector, or an APS connector. An additional type
of connector that enables redundancy is a redundancy connector (RCON) .
•Single-height slots can be converted to double-height slots by removing the center guide modules.
Center guide modules are also called center guides, midrail dividers, or service module slot divider
assemblies. In this guide, the term center guide module is used.
•In the back of the switch, back cards go into bays. The upper bay is also called Bay 1, and the low er
bay is also called Bay 2. Figure 1-3 shows the bay and line numbers for an MGX 8850 switch.
•The MP port on the back of the PXM-UI-S3 user interface back card stands for maint enance port or
modem port. The CP port on the back of the PXM-UI-S3 user interface back card stands for control
port or console port.