Configuration / Port / DSL Near-End(CO)

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DSL Profile General

Max Tone Channel

Specifies the maximum downstream active tone.

Values: 32 (128KHz) to 255 (1020KHz)

Each value represents 4KHz.

Default: 255

Changing this value causes the DSL modems to retrain.

The parameter is only supported on the single-slot ADSL (24-port AC5 and 32-port AC6) cards.

Min Tone Channel

Specifies the minimum downstream active tone.

Values: 32 (128KHz) to 255 (1020KHz)

Each value represents 4KHz.

Default: 32

Changing this value causes the DSL modems to retrain.

The parameter is only supported on the single-slot ADSL (24-port AC5 and 32-port AC6) cards

Training Mode

The transmit rate adaptation configured on this modem. Supported values:

fixed: The rate is negotiated at startup and remains fixed. Modem speed is determined by the fastMaxTxRate or interleaveMaxTxRate parameters.

adaptatstartup: The rate is negotiated at startup and remains fixed. Modem speed is determined by the fastMaxTxRate or interleaveMaxTxRate parameters. If the line is able to support a higher rate, the rate above the minimum is assigned to the available channel (either fast or interleave).

adaptatruntime: The rate is negotiated dynamically and can vary between the maximum and minimum configured rates. If the line conditions change during runtime, the line speed is adjusted. Recommended for video.

Default: adaptatruntime

Channel Ratio (%Fast)

The percentage of excess bit rate that the ADSL modem will distribute to the fast channel. The ratio is defined by the following formula:

[fastMinTxRate / (fastMinTxRate + interleaveMinTxRate)] x 100.

For example, a ratio of 50 percent means that 50 percent of the additional bit rate (in excess of the fast minimum plus the interleaved minimum bit rate) will be assigned to the fast channel, and 50 percent to the interleaved channel.

Values: 50

Default: 50

Target SNR Margin (dB/10)

Target signal to noise margin (in tenths of dBs). This is the noise margin the modem must achieve with a BER of 10-7 or better to successfully complete initialization. Suggested values are 6 dB for data-only or data-voice service and 10 dB for video service with better protection against noise which causes tiling.

Default: 60

Max SNR Margin (dB/10)

Maximum acceptable signal/noise margin (in tenths of dBs). If the noise margin rises above this the modem attempts to reduce its power output to optimize its operation. Reduces crosstalk into other ADSL circuits by not transmitting at an unnecessarily high level. For video, suggested values are 31 for both upstream and downstream.

Default: 310

Min SNR Margin (dB/10)

Minimum acceptable signal to noise margin (in tenths of dBs). If the noise margin falls below this level, the modem attempts to increase its power output. If that is not possible the modem will attempt to re-initialize or shut down. For video, use 2 downstream and 0 upstream and adjust downstream rate proactively just before video degrades.

default: 0

Downshift SNR Margin

Configured Signal/Noise Margin for rate downshift. If the noise margin falls below this level, the modem should attempt to decrease its transmit rate.

default: 0

Downshift Time

Minimum time that the current margin is below Downshift SNR Margin before a downshift occurs.

In the case that RADSL mode is not present, the value will be `0'.

Upshift SNR Margin

Configured Signal/Noise Margin for rate upshift. If the noise margin rises above this level, the modem should attempt to increase its transmit rate.

default: 0

Upshift Time

Minimum time that the current margin is above UpshiftSnrMgn before an upshift occurs.

In the case that RADSL is not present, the value will be `0'.

Fast Max Train Rate

Configured Maximum Transmit rate for `Fast' channels, in bps.  

Fast Min Train Rate

Configured Minimum Transmit rate for `Fast' channels, in bps.  

Interleaved Max Train Rate

Configured Maximum Transmit rate for `Interleave' channels, in bps.  

Interleaved Min Train Rate

Configured Maximum Transmit rate for `Interleave' channels, in bps.  

Max Interleaved Delay

Configured maximum Interleave Delay for this channel. Interleave delay applies only to the interleave channel and defines the mapping (relative spacing) between subsequent input bytes at the interleaver input and their placement in the bit stream at the interleaver output.  Larger numbers provide greater separation between consecutive input bytes in the output bit stream allowing for improved impulse noise immunity at the expense of payload latency.

Reach Extended

Whether extended reach is enabled.

Default: enabled

Enable Init-Failure Trap

Enables and disables the InitFailureTrap. This trap controls whether line up or line down traps are sent while the system is booting up.

Values

Enable

Disable

Default : Disable

Min Tx Threshold Alarm

Minimum CO Tx Sync rate threshold alarm.  If set to 0, this field is disregarded.  Otherwise, if Tx Syncate falls below this value, a trap and alarm will be issued.

Minimum INP

Minimum impulse noise protection.

Conexant Annex-A ports only support 0, 1, 5, 10 and 20 configuration values

(0..1 I 5..160).

Conexant Annex-B ports do not support this object.

Broadcom ports only support the configuration values 0, and 5 through 160 (0

I 5..160). They do not support the AUTO configuration setting.

Values

5 - 160: Specifies the number of symbols in 1/10 increments.

1: Specifies AUTO configuration which automatically selects the INP value

based on configured line rate and configured max-delay.

0: Specifies no protection.

Default 1 (for Connexant Annex-B port)

0 (for Broacom port)

PhyR Support

Whether downstream PHYR is enabled. Only supported by Broadcom PHYR ports.

PhyR Maximum INP

Indicates PHYR maximum impulse noise protection. Only supported by ADSL Broadcom PHYR ports.

5 - 160: Specifies the number of symbols in 1/10 increments.

0: Specifies no protection.

Default 0

PhyR Minimum RSOverhead

PHYR minimum RS overhead. Only supported by Broadcom PHYR ports

Default 0

PhyR Rtx Ratio

PHYR minimum fraction of the line rate allocated for retransmission.

Only supported by Broadcom PHYR ports.

Tx Power Attenuation

Transmit power attenuation. Value ranges from -255 to 255 dB.

CAB Mode

ADSL 2+ cabinet mode setting values are different with Conexant Chipset based balades and Broadcom Chipset based blades.

Conexant Chipset Based Blades:

Off= Sets Cabinet Mode to off

On = Sets Cabinet Mode to ON and downstream cut-off frequency is set to 1.1 Mhz.

Broadcom Chipset Based Blades:

0 = OFF

1 - 15 = Sets Cabinet Mode to ON and selects TX Filter 1-15.

The TX Filters set the downstream cut-off frequency as per the following table:

Filter# Cutoff Frequency

2 646.875 Khz

3 690 Khz

4 733.125 Khz

5 776.25 Khz

6 819.375 Khz

7 862.5 Khz

8 905.625 Khz

9 948.75 Khz

10 991.875 Khz

11 1035 Khz

12 1078.125 Khz

13 1121.25 Khz

14 1164.375 Khz

15 1207.5 Khz

 

March 24, 2012