Applications
3-4
9161-A2-GH30-20
September 1997
T1 Access Unit with High Speed Data and APL
In the example shown in the following diagram, E&M analog voice APMs are
used to transport analog private line (APL) modem traffic instead of voice traffic.
In some parts of the country digital circuits are hard to obtain, and many
applications do not require the higher speeds of digital circuits. This application
allows customers to use existing modems while reducing the cost of using them
by eliminating access lines.
The T1 access unit supports up to three 8-port E&M APMs. A typical application
consists of:
Modem Lines – Eight lines
FEP-CC – 128 Kbps
Router – 896 Kbps
E&M is used to transport the analog information, and no E&M signaling is
involved. In fact, the E&M signaling leads are disconnected in this application (the
operating mode is set to Transmit Only). See Chapter 4,
Setting Up
, for more
information on configuring voice ports.
Terminal
Router
Router
Cluster
Controller
FEP
Mainframe
497-15191-01
T1 Access
Unit
T1 Access
Unit
E&M
(APL Modems)
Downtown HQ
Suburban Office
T1 Access Unit with High Speed Data and APL
