Verilink PRISM 4001 (34-00244) Product Manual - Manual (Page 19)

Operation 3-1 PRISM 4001
9. Test Switch: This switch (FAR /LOC) is used for local
testing. Refer to section Front Panel Testing on page
3-2 in this chapter for more information.
10. Activity Indicators: These two small, recessed LEDs
indicate supervisory and network manager port activity.
11. SUPV: The supervisory jack provides direct terminal
access to control and monitor the 4001. Refer to section
Supervisory Port in this chapter for more information.
LOS
LOC FAR
OOS
LOOP
TST
N
E
T
ERR
D
T
E
TD
RD
RTS
CTS
4001 DDS
CSU /DSU
S
U
P
V 8
1
T R A N S P O R T
®
DCD
DTR
DSR
T
S
T
D
B
U
10
1
DBU ACTIVE
Figure 3-1 4001 Front Panel
2
3
4
5
14
15
16
17
18
1
6
7
8
11
12
13
10
9
3. Operation
This chapter describes general operation of the TxPORT
PRISM 4001 front panel. The 4001 may be controlled man-
ually using the front panel and the circuit board configura-
tion switches (configuration switches are discussed in the
Installation chapter).
The Terminal Operation chapter covers the firmware con-
trolled Terminal Interface program, which gives the user
maximum control. The 4001 may also be controlled using
the 8100A Site Controller.
Factory default settings are underlined through-
out this manual.
Front Panel Controls and
Indicators
The front panel contains 17 LED indicators which convey sta-
tus, alarm, and test information. The front panel also contains
a test switch, a supervisory port connector, and a DBU port
connector. The following descriptions refer to Figure 3-1.
General Status Indicators
1. STATUS: The 4001 has two LED indicators on the
front panel. These general status LEDs provide a quick
check of the 4001’s operating condition (e.g., Alarmed
or Not Alarmed).
If neither LED is lit, the 4001 is not powered. If the
green LED is lit, the 4001 is powered and may be func-
tioning normally. If the red LED is lit, there is a fault
that exceeds alarm thresholds or another type of 4001
failure. The problem can usually be isolated by further
examination of the other front panel LEDs as described
below. Some errors can only be determined through the
terminal interface (OOF, for example).
2. TD: This green LED lights during a mark condition on
the high-speed transmit data line.
3. RD: This green LED lights during a mark condition on
the high-speed receive data line.
4. RTS: This green LED lights when the request to send
signal is active.
5. CTS: This green LED lights when the clear to send
signal is active.
6. DCD: This green LED lights when the data carrier
detect signal is active.
7. DTR: This green LED lights when the data terminal
ready signal is active.
8. DSR: This green LED lights when the data set ready
signal is active.