Paradyne 9161 User Manual page 38

Applications
T1 Access Unit with High-Speed Data and APL
3-4
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:
H
Modem Lines – Eight lines
H
FEP-CC – 128 kbps
H
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,
information on configuring voice ports.
Cluster
Controller
Terminal
T1 Access
Unit
Router
Suburban Office
T1 Access Unit with High-Speed Data and APL
T1 Access
Unit
E&M
(APL Modems)
April 1999
Setting Up , for more
Downtown HQ
FEP
Router
Mainframe
497-15191-01
9161-A2-GH30-40