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OVERVIEW
FRONT PANEL
INDICATORS,
TEST JACKS, AND
SWITCHES
SUPERVISORY
TERMINAL
OPERATING
PROCEDURES
Accessing a CSU
SECTION 3
OPERATION
This section describes the front panel indicators, test jacks, and switches
of the DataComm 551, and the operation of the Supervisory terminal.
Figures 3-1, 3-2, and 3-3 illustrate the DataComm 551 front panel indica-
tors, test jacks, and switches, and explain the function of each. Use of the
test jacks and switches is further detailed in Section 4.
The Supervisory terminal is used to configure, test, and maintain the
DataComm 551 to which it is connected. It is also used to monitor the net-
work Performance Reports provided by the Central Office. The functions
of the Supervisory terminal are menu-oriented: there is a MAIN MENU
which provides access to the DS1 and DS0 DIAGNOSTICS menus and
their screens, and the CSU CONFIGURATION and MAINTENANCE
screens (see Figure 3-4). Each screen displays current data and allows
changes to be made to the data. Thus, the user steps through the menus un-
til the desired screen is displayed, and reviews or changes the data for
individual fields.
a. If the Supervisory terminal locks up (ceases to re-
spond), cycle terminal power (turn it off and then
on). This will not disrupt customer or network
data.
b. In Unframed Mode, some Supervisory terminal
status line indicators are not shown and some front
panel LEDs are not used, and several screens and
menus are altered or removed. These differences
are noted with the affected items.
The Supervisory terminal is typically co-located and used with a single
CSU, as shown in Figure 1-1. However, it can be located and used re-
motely, and it can be used to access more than one CSU. These applica-
tions utilize modems or PMC-100 Performance Monitor Cards, or both, to
3-1
NOTE
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