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HAPTER
4
| Status Information
ARP Table
– 55 –
◆ S (RS code word size in DMT farme) — Displays the number of valid
data symbols included by the RS code word in the DMT frame.
◆ D (interleaver depth) — Displays the actual depth of the interleaver
used in the latency path in which the bearer channel is transported.
Interleavers arrange data in a non-contiguous way in order to increase
performance.
◆ Delay (nsec) — Displays interleave delay in nano-seconds (nsec).
Interleave delay applies only to the interleave (slow) channel and
defines the mapping (relative spacing) between subsequent input bytes
at the interleaver input and their placement in the bit stream at the
interleaver output.
◆ FEC — Displays forward error correction (FEC), a system of error
control for data transmission, whereby the sender adds redundant data
to its messages, also known as an error correction code.
◆ CRC — Displays the CRC (cyclic redunancy check) - a type of function
that takes as input a data stream of any length, and produces as output
a value of a certain space, commonly a 32-bit integer.
◆ Total ES — Displays the total error seconds, the number of second
intervals during which there was one or more CRC anomalies, or one or
more Loss of Signal (LOS) or Loss of Framing (LOF) defects.
◆ Total SES — Displays the total severly errored seconds. The number of
second intervals containing 18 or more CRC-8 anomalies, one or more
Loss of Signal (LOS) defects, one or more Severely Errored Frame
(SEF) defects, or one or more Loss of Power (LPR) defects.
◆ Total UAS — Displays the total unavailable errored seconds, the
number of seconds during which the ADSL transceiver is powered up
but not available.
ARP TABLE
The ARP page displays IP address to MAC address mapping entries
determined by the Address Resolution Protocol.
Figure 21: Status - ARP Table