About the Hotwire 7975 Standalone Termination Unit
1-3
7975-A2-GB20-40
December 1998
Network Configuration
Figure 1-1 shows a network application using a 4-port Hotwire 8775 M/SDSL
Termination Unit for access concentration in a central office (CO). A frame relay
switch and a router are connected, through the termination unit, to partner units
supporting a host or router, and frame relay encapsulated or unframed data.
Frame
Relay
Switch
Router
E1 Host
(Frame Relay
Encapsulated
Data)
98-15938
Router
(Frame Relay
Encapsulated
Data)
V.35
V.35
V.35
Router
2.048 Mb
over
SDSL
V.35
V.35
V.35
8775 Termination Unit
in 8600 DSLAM
CO Site
7975
7975
7975
Customer
Premises (CP)
7975
7975
Customer
Premises
NTU
CO Site
LTU
V.35
V.35
Figure 1-1.
Sample M/SDSL Configurations
User Interface Types
There are three types of user interfaces to the 7975 Standalone Termination Unit:
H
Menu-driven async terminal interface screens. See Chapter 2,
Using the
Asynchronous Terminal Interface
.
H
Front panel LED status indicators. See Chapter 4,
Monitoring the Unit
.
H
Internal DIP Switches. See Chapter 3,
Initial Startup and Configuration
.
