IES-1000 User’s Guide
ADSL Commands 24-5
The results contain the operating modes, interleave delay, parity byte assignment and parity bytes per codeword,
symbols per codeword and interleave depth. Information obtained prior to training to steady state transition will
not be valid or will be old information. Annex A refers to POTS.
Table 24-1 Lineinfo Command
LABEL DESCRIPTION
Service Type in
Operation
This is the ADSL standard that the port is using: G.dmt (AAM1008-61), G.dmt Annex B
(AAM1008-63), ETSI (AAM1008-63), G.lite or ANSI T1.413 issue 2 (AAM1008-61).
Number of
Channels
An ADSL port on the network module uses one downstream channel and one upstream
channel.
Downstream
Framing
Structure
This displays the framing mode that the network module uses on the traffic that it sends.
“0” is full overhead framing with the synchronization control mechanism enabled
(asynchronous bit-to-modem timing)
“1” is full overhead framing with the synchronization control mechanism disabled
(synchronous bit-to-modem timing).
“2” is reduced overhead framing with separate fast and synchronization bytes in the
respective fast and interleaved latency buffers. This produces 64 kilobits per second of
framing overhead.
“3” is reduced overhead framing with a merged fast and synchronization byte, using either
the fast or the interleaved latency buffer. This produces 32 Kbps of framing overhead.
Active down/up
stream rate
option
This is the rate option currently being used for the down/upstream channel.
TRELLIS
operation mode
is
Trellis coding helps to reduce the noise in ADSL transmissions. Trellis may reduce
throughput but it makes the connection more stable.
1
Down/up stream
interleaved
Delay
The numbers of milliseconds of interleave delay for downstream and upstream
transmissions are listed.
Downstream
Parity byte
assigned to
fast/interleaved
This is the current number of downstream parity bytes (FEC Redundancy) per Reed
Solomon codeword that are assigned to the fast or interleaved buffer.
Upstream
Parity byte
assigned to
fast/interleaved
This is the current number of upstream parity bytes (FEC Redundancy) per Reed Solomon
codeword that are assigned to the fast or interleaved buffer.
Downstream
Symbols assigned
to
fast/interleaved
This is the current number of downstream symbols per Reed Solomon codeword value
that are assigned to the fast or interleaved buffer. This should always be 1 for fast mode.
Upstream
Symbols assigned
to
fast/interleaved
This is the current number of upstream symbols per Reed Solomon codeword value that
are assigned to the fast or interleaved buffer. This should always be 1 for fast mode.
1
At the time of writing, the AAM1008 always uses Trellis coding.
