ZyXEL Communications VES-1012 -, Hardware Installation Manual, Page: 20 / 46

VES-1012 Hardware Installation Guide
3-2 Installation Scenarios
Figure 3-2 Telco Cable
3.3 MDF (Main Distribution Frame)
An MDF is usually installed between end-users’ equipment and the telephone company (CO) in a basement or
telephone room. The MDF is the point of termination for the outside telephone company lines coming into a
building and the telephone lines in the building.
Figure 3-3 MDF (Main Distribution Frame) Wiring
Connect wiring to end-user equipment to the lower ports of an MDF and connect wiring from the telephone
company to the upper ports of an MDF (see the previous figure).
Some MDFs have surge protection circuitry built in between the two banks. Do not connect telephone wires from
the telephone company directly to the VES-1012.
Use a punch-down tool to seat telephone lines into MDF blocks.