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NCT480 IP DSLAM User Guide YML856 Rev3
58 www.netcomm.com.au
Item Description
Maximum SNR Margin
This specifies Maximum SNR Margin which the ATU-R receiver shall try to sustain. If
the noise margin is above this level, the ATU-R shall request the ATU-C to reduce the
transmit power to get a noise margin below this limit.
Valid values: 0 ~ 310 (dB/10)
Minimum SNR Margin
This specifies Minimum Noise Margin which the ATU-R receiver shall tolerate. If the
noise margin falls below this level, the ATU-R shall request the ATU-C to increase the
ATU-C transmit power. If an increase to ATU-C transmit power is not possible, a loss-of-
margin (LOM) defect occurs, the ATU-R shall fail and attempt to reinitialize.
Valid values: 0 ~ 310 (dB/10)
Tx Rate and Delay (ATUC/ATUR)
Minimum Tx Rate
Configured Minimum Transmit rate for ADSL line channels, in bps.
Valid values (ATU-C Downstream): 32 ~ 28000 (kbps)
Valid values (ATU-R Upstream): 32 ~ 2784 (kbps)
Maximum Tx Rate
Configured Minimum Transmit rate for ADSL line channels, in bps.
Valid values (ATU-C Downstream): 64 ~ 28000 (kbps)
Valid values (ATU-R Upstream): 0 ~ 2784 (kbps)
Maximum Interleave Delay
Configured maximum Interleave Delay for this channel. Interleave delay applies
only to the interleave channel and defines the mapping (relative spacing) between
subsequent input bytes at the interleave input and their placement in the bit stream at
the interleave output. Larger numbers provide greater separation between consecutive
input bytes in the output bit stream, allowing for improved impulse noise immunity at
the expense of payload latency.
Valid values: 0 ~ 255 (mSec)
Power Management
Power Management mode
Power Management-related parameter used by ATU-C to set the allowed link states.
Both bit values can be given simultaneously in the input.
L2 Entry Rate (Kbps)
Power Management configuration parameter. L2 state entry data rate.
Valid values: 0 ~ 30000
L2 Minimum Rate (Kbps)
Power Management configuration parameter, related to the L2 low power state. This
parameter specifies the minimum net data rate during the low power state (L2).
Valid values: 8 ~ 1024 (kbps)
L2 Entry Time (sec)
Power Management configuration parameter. Min L2 entry rate time
Valid values: 900 ~ 65535
L2 Exit Rate (Kbps)
Power Management configuration parameter. L2 state exit data rate.
Valid values: 0 ~ 30000
Table 4-2 Monitoring Line Profile Configuration