Equinox Systems MEGAPORT Hardware Reference Manual page 59

Punch Blocks
Punch blocks provide a quick and inexpensive solution to wiring
around buildings. They may be concealed in wiring closets and
individual wires run to each location where a terminal or port is to be
connected. Punch blocks may be used with modular wall outlets and
wiring accessories.
Figure 4-11 illustrates connecting the MEGAPORT board to punch
blocks using modular adaptors and modular wall outlets. Wall outlets
should be wired as shown in Figure 4-12 below. Figure 4-13 shows
the pinouts for the Equinox part number 210044 punch block when
connected to a MEGAPORT LD board.
Note that the punch block has two 50-pin PBX connectors and
connects 24 ports. Also note that internally the punch block has
common ground wired to the center two rows of pins. In LD
applications these pins are not used.
Punch Two-twisted-pair Modular
Block or modular Adaptors
cables
Wall Outlets
Figure 4-11. Punch block Installations.
Figure 4-12. Modular wall outlet wiring: LD ports.
Connecting Devices to LD Ports 53