Verilink PRISM 3001 (34-00186) Product Manual - Manual (Page 31)

3
O
PERATION
Introduction This chapter contains general operation instructions for the TxPORT PRISM 3001
front panel. The unit may be controlled manually using the front panel and the
circuit board configuration switches (configuration switches are discussed in the
Installation chapter).
The Terminal Operation chapter covers the firmware-controlled Terminal Interface
program, which provides more control. The unit may also be controlled using the
TxPORT EM8000 Element Manager (refer to the EM8000 reference manual) or
8100A Site Controller.
Front Panel
Controls and
Indicators The front panel contains 19 LED indicators which convey status, alarm, and test
information. The front panel also contains a test switch, a supervisory port
connector, and a BERT pattern switch. The following descriptions are referenced
to Figure 3-1.
General
Status
Indicators
1 STATUS: The unit has two LED indicators on the front panel bezel that are
exposed whether the access door is open or closed. These general status LEDs
provide a quick check of the unit’s operating condition (Go or No Go).
If neither LED is on, the unit is not powered. If the green LED is on, the unit is
powered and functioning normally. If the red LED is on, there is a line fault that
exceeds alarm thresholds or another type of unit failure. The problem can be
isolated by further examination of the other front panel LEDs as described in the
following paragraphs. NMS alarms are displayed by the two LEDs alternately
turning red and green about every half second which occurs when the unit is
managed by an 8100A that detects a duplicate address or invalid address (0 to 63
are valid). The 8100A detects these error conditions and notifies the unit to enter
an NMS-alarm condition. Once the error condition has cleared, (either the
duplicate address is removed or an invalid address is corrected) the 8100A notifies
the unit to clear the NMS-alarm condition.
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.