Verilink PRISM 4051 (34-00253.2) Product Manual - Manual (Page 23)

3
O
PERATION
Introduction This chapter describes general operation of the Verilink
PRISM 4051 front panel. The 4051 may be controlled
manually using the front panel and the circuit board
configuration switches (configuration switches are
discussed in section Unit Configuration on page 6).
Chapter Terminal Operation covers the
firmware-controlled Terminal Interface program, which
gives the user maximum control. The 4051 may also be
controlled using the 8100A Site Controller.
Factory default settings are underlined throughout this
manual.
Front Panel
Controls and
Indicators The front panel contains 12 LED indicators which convey
status, alarm, and test information. The front panel also
contains a test switch and a supervisory port connector.
The following descriptions refer to Figure 3-1.
General Status
Indicators
1 STATUS: The 4051 has two general status indicators on
the front panel that provide a quick check of the 4051
operating condition (Alarmed or Not Alarmed).
If neither indicator is On, the 4051 is not powered. If the
green indicator is On, the 4051 is powered and may be
functioning normally. If the red indicator is On, there is a
fault which exceeds alarm thresholds or another type of
4051 failure. The problem can usually be isolated by
further examination of the other front panel indicators as
described below. Some errors can only be determined
through the terminal interface (for example, OOS).
2 TD: This green indicator lights during a mark condition
on the high-speed transmit data line.
3 RD: This green indicator lights during a mark condition
on the high-speed receive data line.
✍
STATUS
4051
CSU/DSU
LOS
OOF
TD
RD
RTS
DTR
S
U
P
V
N
E
T
T
S
T
LOC FAR
LOOP
BERT
ERR
D
T
E
Figure 3-1 4051 Front Panel
2
3
4
11
12
5
6
7
8
9
10
1
13