2Giga Ethernet Managed 4 Band VDSL IP DSLAM USER’S MANUAL Ver. A.4
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If your line is particularly susceptible to bursts of noise then interleaving should improve your vdsl experience simply
because if you lose a whole batch of data then this could cause your modem to loose sync with the exchange.
Using Interleaving, the modem is able to re-assemble the data or if necessary just re-request the part of the data that
it is unable to recover. By increasing the interleave depth of each ports that are susceptible to noise, this will improve
error performance and stability of marginal lines.
Interleave Depth
is defines as the number of bits (or bytes) in each block of data.
VDSL supports a various levels of interleaving, the depth of which can range from 0 (no interleaving) to 64.
Interleave Delay
is defines as the mapping (relative spacing) between subsequent input bytes at the interleave input
and their placement in the bit stream at the interleave output.
Maximum Interleave Delay
is the configurable attribute on some DSLAMs/routers as the maximum time for the
Interleave Delay. The higher the Interleave Delay the greater the Interleaving Depth.
Note:
Interleaving Depth & Interleaving Delay do not appear to be the same thing as the additional amount of latency
you will see when interleaving is switched on nor is latency affected by speed (e.g. it does not decrease when you go
from 1Mb to 5Mb).
