Ncc Performance; Dac 16X/4X E1 Trib Error Performance - Alcatel-Lucent 9500 MXC User Manual

Link Performance Screen Navigation

NCC Performance

DAC 16x/4x E1 Trib Error Performance

3DB 23063 ADAA - Rev 004 July 2007
Select the required link from Select new module.
Status Monitors captures RSL, Remote Fade Margin, Detected Tx power, ODU
Temperature, -48Vdc ODU Supply Voltage, Cross-polarization Discrimination,
Current BER Reading. The cross-polarization discrimination data only applies to
RAC 40s, and is as measured at the input to RACs (before XPIC discrimination
improvement). Data is updated at 2 second intervals.
The current BER reading is just that. It presents a BER estimate from one
2-second measurement interval to the next. It does not reflect an
average-over-time BER.
G.826 Monitors captures link G.826 statistics. On opening, these data lines are
empty. To enable, click the Start button. G.826 data aggregates from this point
forward for as long as CT is logged on, or until the Stop or Clear buttons are
selected. Data is updated at 2 second intervals.
For the 9500 MXC Node the Performance Monitor screen can be enabled for all
links on the node. Viewing other CT screens does not affect the aggregation of
performance data.
If the Node/Terminal is powered off, reset, the link (RAC) withdrawn or its ODU
disconnected during data capture, a warning is displayed advising that collected
data has been interrupted.
The NCC Performance screen presents NCC temperature and -48Vdc supply
voltage to the NCC. Screen presentation and navigation is identical to the Link
Performance screen.
A CRC (Cyclic Redundancy Check) function can be enabled on E1 DACs to
provide a background error performance indicator for a selected E1 trib circuit.
• This CRC function is provided for E1 rates only.
• It is currently supported only on DAC 16x and DAC 4x.
• It can only be enabled on one trib at a time.
The check process accesses the G.704, CRC4 Multiframe, which is a background
error check function provided between devices operating with G.704 framing.
• The circuit being monitored must be end-to-end terminated on framed-rate
multiplexers, or similar, to generate the G.704 framing, which includes the
CRC function. In other words, the circuit supported by the DAC 16x/4x must
be operational for user traffic to provide the multiframe needed for the
monitoring process.
9500 MXC User Manual
Vol. IV-15-31