VDSL Hospitality 100+ Rooms Setup Guide
1/05/05 Page 5 of 23
The Line Card Chassis contains one line card for each splitter card in the Splitter Chassis. VDSL line
cards (in this case VLC1124 cards) are installed into the chassis. The cards have two inputs, on Telco-50
port, and one Ethernet Uplink port. The Telco-50 port connects directly to the front of the corresponding
splitter card, and acts as an input and output for voice and data service. The Uplink port connects to an
Ethernet switch (usually a managed switch like an ES-3024 for VLAN purposes), and acts as the data
relay to the Internet.
Cards are hot-swappable, allowing for quick change-out without service disruption for users connected to
other cards. Each splitter card/ line card combo supports up to 24 ports, or modems.
In each room a VDSL modem is placed. The modem has an input from the wall outlet, and two outputs:
one phone port for an analogue telephone, and an Ethernet port for a computer connection. Because all
of the parameters are programmed in the line card, the modem has no settings to configure.
Installation
Telephone closet preparation
One of the trickiest parts with setting up a VDSL network is integrating it with the existing telephone
service. Although the ISP will usually take care of installing the Internet connection where you need it,
they will not help you install it with your in-building DSL solution.
Typically the telephone company providing the building’s voice service will contract installers to set up
and maintain in-building voice equipment and PBXs. Therefore, you will probably need to contact your
telephone company to have the contractor help install the necessary connectors for your voice service, if
they are not already present.
The input and output for all ZyXEL DSL DSLAM equipment is a standard Telco-50 connector. These
connectors are trapezoidal in appearance and contain 50 pins, which are paired up to provide the
necessary pair to each user or room. The contractor will need to terminate all connections coming from
the PBX to Telco-50 connectors in order for them to be properly connected to your VES equipment. Also,
the connections going to each room will also need to be terminated with Telco-50 connectors.
Typically, all of the PBX and room lines will be connected to a Main Distribution Frame (MDF) inside of
the telco closet. The MDF usually consists of two parts: an upper block for the incoming lines, and a
lower block for outgoing lines to users. These may or may not already be terminated into Teclo-50
connectors. Your Teclo-50 connectors will most likely be installed into this MDF. When wiring these
Telco-50 connectors, it is important that they be wired for the correct pin-outs, as explained below.
Proper Pin-Outs
The pin-outs for the Telco-50 connectors will depend on the VES equipment being used. Here is an
example pin-out from the VES-2500 DSLAM:
