Accton Technology VM2548 - Manual (Page 31)

3-1
Chapter 3: Installing the VDSL Switch and Splitter
Preparing the Site
In multi-tenant buildings, phone lines coming from the service provider are generally
attached to a PBX or MDF distribution box in the basement. These lines run from the
PBX to a punch-down block, and then up to the POTS terminals for individual users.
The following figure displays the normal wiring before installing the VDSL switch and
splitter.
Figure 3-1. Wiring before VDSL Switch and Splitter Installation
Installing Additional Phone Line Equipment
The switch and splitter should be installed close to the PBX and the punch-down
block, usually in the basement or wiring closet. You may also want to install a rack
for distribution equipment, such as a splitter, switch, router, or patch panel.
An optional patch panel can be used to connect the circuits between the splitter and
the punch-down blocks. If a patch panel is not used, the splitter connects directly to
the PBX for the incoming phone lines and the punch-down block used for the VDSL
lines running up to the end users. In this case, the punch-down blocks must have an
RJ-21 connector.
Equipment Checklist
Before installing the switch and splitter, verify that you have all the items listed under
“Package Contents.” If any of the items are missing or damaged, contact your local
Accton distributor. Also, be sure you have all the necessary tools and cabling before
installing the switch and splitter. Note that these devices can be installed on any
suitably large flat surface or in a standard EIA 19-inch rack.
Punch-Down Blocks
PBX
Telephone Line
from Central Office
Existing Phone
Lines to Clients
Upper Floors
Basement