Maintenance
150-231-175-01, Revision 01
12
September 23, 1998
HLU-231 List 7E
Figure 4.
DB-9 RS-232 I/O Pinouts
M
AINTENANCE
This section explains how to navigate through the Maintenance Terminal screens and describes the Main Menu
and its various options.
N
AVIGATING
THE
M
AINTENANCE
T
ERMINAL
S
CREENS
The following sections describe how the Maintenance Terminal displays an HLU-231 system with and without
doublers, how to navigate through the maintenance screens, and how to select options.
System Spans
As shown in
, the HLU can support up to two doublers with three HDSL spans. The Span Status,
Performance Data, and Performance History may display as many as three screens to describe HLU-231 system
status.
DB-9 Connector
(DCE)
RD (Recieve Data)
TD (Transmit Data)
3
2
5
DB-9 Connector
(DTE)
DB-25 Connector
(DTE)
TERMINAL
TERMINAL
3
2
5
2
3
7
GND
HLU-231
