Configuration / Port / DSL Far-End (CPE) Help

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Far-End (CPE) Profile

Port

The port assigned to this interface.

Max Tone Channel

Specifies the maximum upstream active tone.

Values 6 (24 KHz) to 30 (120 KHz)

Each value represents 4 KHz.

Default: 30

Changing this value causes the DSL modems to retrain.

Min Tone Channel

Specifies the minumum upsteram active tone.

Values: 6 (24KHz) to 30 (120KHz)

Each value represents 4 KHz.

Default: 6

Changing this value causes the DSL mode

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.

Default: adaptatruntime

Channel Ratio (%Fast)

Configured allocation ratio of excess transmit bandwidth between fast and interleaved channels.

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.

Default: 60

Max SNR Margin

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.

Default: 310

Min SNR Margin

Minimum 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.

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

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

Downshift Time (sec)

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'."

Min Upshift Time

Minimum time that the current margin is above Upshift SNR Margin before an upshift occurs.

default: 0

Upshift Time (sec)

Minimum time that the current margin is above Upshift SNR Margin before an upshift occurs.

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

Max Train Rate

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

Min Train Rate

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

Interleaved Max Train Rate (bps)

Maximum transmit rate (in bps) for channels configured for interleaved transmission mode.

Interleaved Min Train Rate (bps)

Minimum transmit rate (in bps) for channels configured for interleaved transmission mode.

Interleaved Delay

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 throughput.

Min Downshift Time

Minimum time that the current margin is below DownshiftSnrMgn before a downshift occurs.

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

Max Train Rate

Maximum transmit rate (in bps) for channels configured for fast transmission mode.

For a CPE interface, the range is 32 Kbps to 896 Kbps (512 Kbps for G.lite)

MinTrain Rate

Minimum transmit rate (in bps) for channels configured for fast transmission mode.

Interleaved Delay

Interleave Delay for this channel.

Interleave delay applies only to the interleave (slow) channel and defines the mapping (relative spacing) between subsequent input bytes at the interleave input and their placement in the bit stream at the interleave 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.

For fast channels, this is zero

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

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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.

May 14, 2011