Exfo MaxTester MAX-630 User Manual download pdf (Page 90)

Running DSL/IP Tests and Viewing Results

84 MAX-630

DSL Parameter Details

 Interleave Delay defines the mapping (relative spacing) between

subsequent input bytes at the interleave input and their placement

in the bit stream at the interleave output.

 INP is the level of impulse noise protection.

 Interleave Depth defines the number of bits (or bytes) in each

block of data.

 Bitswap specifies the status of the bit swapping mechanism -

Active, Not Active, or Unknown - swapping bits from tone m to

tone n to prevent modem retraining.

 Trellis or Trellis Coded Modulation (TCM) is a type of convolutional

code which utilizes parity bits on each symbol within a continuous

data stream. When the line is connected, Trellis displays either On

or Off.

 Phy-R is Broadcom proprietary Physical Layer Retransmission

technology which is used to overcome impulse noise.

G.INP is the standards based Physical Layer Retransmission

scheme for impulse noise protection and will report Active or

Not Active. G.INP state will be shown unless system is using Phy-R.

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Exfo MaxTester MAX-630 User Manual Page 90