700-712-100-01, Revision 01
Functional Description
UTU-712 and ETU-762 List 1
May 10, 1999
11
F
UNCTIONAL
D
ESCRIPTION
This section provides a functional description of the line and desktop units, including major components,
single-pair application mode, alarms, and testing (including monitoring and loopbacks).
M
AJOR
C
OMPONENTS
The major components of the line and desktop units include:
•
Nx64k serial data port (V.35, V.36, X.21, or RS-530)
•
high-speed, rate selectable HDSL interface (including framing, transceiver, and line interface circuits)
•
system timing circuits
•
processor
•
on-board power supply modules.
shows a functional block diagram of the line and desktop units.
Figure 5.
Line and Desktop Unit Functional Block Diagram
