IES-1000 User’s Guide

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

This is the ADSL standard that the port is using: G.dmt (AAM1008-61), G.dmt Annex B

Operation

(AAM1008-63), ETSI (AAM1008-63), G.lite or ANSI T1.413 issue 2 (AAM1008-61).

Number of

An ADSL port on the network module uses one downstream channel and one upstream

Channels

channel.

Downstream

This displays the framing mode that the network module uses on the traffic that it sends.

Framing

“0” is full overhead framing with the synchronization control mechanism enabled

Structure

(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

This is the rate option currently being used for the down/upstream channel.

stream rate

 

option

 

TRELLIS

Trellis coding helps to reduce the noise in ADSL transmissions. Trellis may reduce

operation mode

throughput but it makes the connection more stable.1

is

 

Down/up stream

The numbers of milliseconds of interleave delay for downstream and upstream

interleaved

transmissions are listed.

Delay

 

Downstream

This is the current number of downstream parity bytes (FEC Redundancy) per Reed

Parity byte

Solomon codeword that are assigned to the fast or interleaved buffer.

assigned to

 

fast/interleaved

 

Upstream

This is the current number of upstream parity bytes (FEC Redundancy) per Reed Solomon

Parity byte

codeword that are assigned to the fast or interleaved buffer.

assigned to

 

fast/interleaved

 

Downstream

This is the current number of downstream symbols per Reed Solomon codeword value

Symbols assigned

that are assigned to the fast or interleaved buffer. This should always be 1 for fast mode.

to

 

fast/interleaved

 

Upstream

This is the current number of upstream symbols per Reed Solomon codeword value that

Symbols assigned

are assigned to the fast or interleaved buffer. This should always be 1 for fast mode.

to

 

fast/interleaved

 

1At the time of writing, the AAM1008 always uses Trellis coding.

ADSL Commands

24-5