Chapter 15. Diagnostics
Vol. IV-15-56 Alcatel-Lucent
DAC/Tributary Menu
For a 9500 MXC Node and an IDU ES a DAC tributary screen opens to reflect
the DAC type selected.
For 9500 MXC PDH and SDH Terminals the tributary type (NxE1/DS1, STM1/
OC3) is fixed for the IDU type.
Refer to:
• DAC System/Controls Screen: PDH and SDH DACs on page 15-56
• Loopback and AIS Safety Timer Operation on page 15-58
• PRBS Generation on page 15-58
• Protected DAC Screens on page 15-60
DAC System/Controls Screen: PDH and SDH DACs
Figure 15-20 shows an NxE1/DS-1 DAC, which provides trib-by-trib selection
of:
• Line facing loopback
• Radio facing (bus facing) loopback
• Transmit AIS
• PRBS generator with G.821 data receiver
A loopback or AIS can be enabled on a trib (loopback and AIS selections are
mutually exclusive; only one can be selected per trib).
A loopback or AIS can be enabled on any number of tribs at the same time.
PRBS can only be enabled on one trib at a time.
Refer to Figure 15-25 on page 15-66 for DAC loopback points and loopback
directions.
The Event Browser and Alarm screens capture the application and subsequent
release of Link diagnostic options. While Link diagnostics are active:
• The diagnostic icon is displayed in the CT status bar.
• For a Node the NCC Test LED flashes orange.
• For a Terminal the IDU Status LED flashes orange.
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