ZyXEL Communications IES-2500, User Manual, Page: 36 / 65

IES-2500 User’s Guide
5-2 MDF Connections
Use a punch-down tool to seat telephone lines into MDF blocks.
Multiple upper and lower MDF port connections are shown as one line in the following figures.
5.3 Telco-50 Cables
Telco-50 cables are used for data and voice applications with MDFs (Main Distribution Frame), patch panels and
distribution boxes. They can also be used as extension cables. Telco-50 cables are made up of 25 twisted-pair
copper wires. Connect a Telco-50 connector to one end of the cable (see appendices for pin assignments) and
connect the other end directly to an MDF.
5.4 Splitter Chassis Rear Panel Connections
A DSL splitter card separates the voice signal from the DSL signal. It feeds the DSL signal to the DSL line card
and diverts the voice signal to the
CO Telco-50 connector (or wire wrapping pins) on the splitter chassis’s rear
panel.
Connect the CO Telco-50 connector or wire wrapping pins to the PBX or PSTN/ISDN switch when using the
ADSL splitter card or VDSL splitter card.
Connect the USER Telco-50 connector (or wire wrapping pins) to the subscribers’ telephone wiring. In most multi-
tenant unit applications, the USER pins connect to the subscribers’ telephone wiring via Main Distribution Frame
(MDF).
See the section on MDF scenarios for details on splitter chassis rear panel connections.
5.5 MDF Scenarios
The following figure gives an overview on a possible installation scenario for the IES-2500 using the ADSL or
VDSL line and splitter cards. Data and voice signals can coexist on the same telephone wiring.
Figure 5-2 Installation Overview Example