Specifications

Reference Guide
4-69
System Configuration and Operation Using the Broadcast Option
4.21 Using the Broadcast Option
One of the special features of WAN time slot assignment in cross-connect systems is the
ability to copy a data signal and send it to multiple locations without disturbing the original
circuit. This feature is called
broadcasting,
which means “multi-cast” (not to be confused with
broadcast-quality video transmission).
For example, assume that a major company has a video lecture transmitted from the corporate
headquarters in Denver to the sales office in San Francisco. The sales offices in Salt Lake City,
Houston, and Phoenix would also like to view the lecture.
The master circuit (Denver to San Francisco) is a two-way circuit (i.e., both ends can send and
receive data). The other ends of the broadcast circuits (the sales offices in Salt Lake City,
Houston and Phoenix) will only be able to receive the output of the Denver end of the master
circuit. That is, they will not be able to participate in the live discussion.
The following series of figures shows how the process works.
Figure 4-44 shows the Main Cross-Connect screen. In this example, T1 circuits connected at
the Denver office go to San Francisco (
w1-1
), Houston (
w1-2
), Salt Lake City (
w2-1
), and
Phoenix (
w2-2
).
Note:
The screen only shows the cross-connects made from WAN cards to WAN cards, not
from user cards to WAN cards.