Chapter 6 Basic Setting

Table 14 VDSL Profile Setup (continued)

LABEL

DESCRIPTION

Rate Adaptive

Rate adaption is the ability of a device to adjust from the configured transmission

 

rate to the attainable transmission rate automatically depending on the line quality.

 

The VDSL transmission rate then stays at the new rate or adjusts if line quality

 

improves or deteriorates.

 

Select a rate adaptive mode. Select Manual to disable transmission rate

 

adjustment. Select AdaptAtInit to enable the switch to adjust to a new lower rate

 

when the line quality deteriorates until the connection is broken.

 

 

Max SNR

Select the maximum SNR (Signal to Noise Ratio) margin allowed on the channel.

 

 

Target SNR

Select the target SNR (Signal to Noise Ratio) margin for the channel.

 

 

Min SNR

Select the minimum SNR (Signal to Noise Ratio) margin allowed on the channel.

 

 

MaxInterleave

Specify maximum interleave delay for the slow channel. It is recommended that

Delay

you configure the same latency delay for both downstream and upstream.

 

 

Max Aggregate

Specify the maximum aggregate power level for upstream and downstream

Power

transmission.

 

 

Rate Ratio

Select to use the data rate allocated for the fast or slow channel. Valid values are

 

0 and 100.

 

Enter 0 to use slow channel (at the rate you specified in the Slow Channel

 

Payload Rate field) which is best suited for data transmission.

 

Enter 100 to use fast channel (at the rate you specified in the Fast Channel

 

Payload Rate field) for latency-sensitive applications (such as voice).

 

 

Impulse Noise

Specify the level of impulse noise (burst) protection (in microseconds) for a slow

Protection

(or interleaved) channel. Enter a number between 0 and 1275.

 

 

FEC Redundancy

This field displays the Forward Error Correction (FEC) redundancy overhead for a

 

fast channel.

 

This field is neither configurable nor applicable at the time of writing.

 

 

Template PSD

Select a PSD mask for the upstream and downstream traffic.

Mask

 

 

 

PBO Control

Set the upstream PBO control. PBO (Power Back Off) allows the switch to provide

 

better service in a network environment with telephone wiring of varying lengths.

 

Select Disable to disable this feature.

 

Select Auto to set the switch to automatically adjust the power backoff.

 

Select Manual to specify a power backoff level in the PBO Level field.

 

 

PBO Level

If you select Manual in the PBO Control field, select a PBO level.

 

 

Band Plan

Specify a VDSL band plan to use for the line.

 

Select BandPlan998 for ITU-T G.993.1 Bandplan-A and ANSI Plan 998.

 

 

Band Plan FX

This field displays the band frequency range (3750 to 12000) between the D2 and

 

U2 bands.

 

This field is neither configurable nor applicable at the time of writing.

 

 

Applicable

Your switch automatically selects a standard to use for VDSL services.

Standard

 

 

 

Deployment

Specify a VDSL deployment scenario.

Scenario

Select FTTCab if the switch is located in a street cabinet.

 

Select FTTEx if the switch is located at the central office (CO).

 

 

 

79

VES-1616F-3x Series User’s Guide