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This appendix includes miscellaneous statistics that you can use when provisioning subscribers on a Cisco 6100 Series system.
This appendix includes the following sections:
The Cisco 6100 and Cisco 6130 chassis support module intermixing. However, the quad-port STU-C modules must be segregated in either the left or right half of the chassis (left half is slots 1 to 8 and 21 to 28; right half is slots 13 to 20 and 31 to 38 ). The STU-C modules may not be intermixed with other module types within the same chassis half. Table 1 details the module intermixing configurations in a Cisco 6100 or Cisco 6130 chassis.
| Module Combination | Cisco 6100 Chassis | Cisco 6130 Chassis |
|---|---|---|
Dual-port DMT-2 ATU-C and | Not supported | Supported |
Dual-port DMT-2 ATU-C and | Not supported | Not supported |
Dual-port CAP ATU-C and | Not supported | Not supported |
Dual-port CAP ATU-C and | Not supported | Not supported |
Dual-port DMT-2 and | Not supported | Not supported |
Dual-port DMT-2 and | Not supported | Not supported |
Dual-port CAP ATU-C and | Not supported | Not supported |
Quad-port flexi ATU-C (CAP mode) and quad-port flexi ATU-C (DMT mode) | Supported | Supported |
Quad-port flexi ATU-C (CAP mode) and quad-port STU-C | Not supported | Supported |
Quad-port flexi ATU-C (DMT mode) and quad-port STU-C | Not supported | Supported |
You can configure Reed-Solomon (RS) error coding per subscriber.
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Note You can disable Reed-Solomon for 136 kilobaud rate in the downstream direction only. |
Consider the following guidelines in relation to using Reed-Solomon coding:
Table A-2 describes ViewRunner performance counters for a DMT-2 module.
| Performance Monitor Name | Description |
|---|---|
The near-end HEC_violation_count-I performance parameter is a count of the number of occurrences of a near-end hec-I anomaly. | |
HecViolF | The near-end HEC_violation_count-I performance parameter is a count of the number of occurrences of a near-end hec-F anomaly. |
The near-end HEC_violation_count-I performance parameter is a count of the number of occurrences of a near-end hec-I anomaly. | |
HecCellI | Total_cell_count-I performance parameter is a count of the total number of cells passed through the cell delineation process operating on the interleaved data while in the SYNC state. |
Total_cell_count-F performance parameter is a count of the total number of cells passed though the cell delineation process operating on the fast data while in the SYNC state. | |
The far-end attenuation is the attenuation measured at the far-end. It can be read from the eoc ATN register using the eoc command set. The eoc ATN register is coded as an unsigned integer, ranging from 0 to 127, corresponding to a 0 to 63.5 dB attenuation (0.5 dB steps). | |
The far-end SNR margin is the SNR margin measured at the far-end. | |
The SNR margin represents the amount of increased received noise (in dB) relative to the noise power that the system is designed to tolerate and still meet the target bit error rate (BER) of 10 7, accounting for all coding (for example, RS FEC) gains included in the design. The SNR margin ranges from -64.0 dB to +63.5 dB with 0.5 dB steps | |
The attenuation is the difference in dB between the power received at the near-end and that transmitted from the far-end. Received signal power in dBm is the sum of all data-carrying (that is, b i > 0) DMT-2 sub-carrier powers averaged over a 1-second period. Transmitted signal power is 3.65 + 10log(S gi 2) dBm, summed over the data-carrying subcarriers. The attenuation ranges from 0 to 63.5 dB with 0.5 dB steps. | |
This parameter is a count of 1-second intervals for which the ADSL line is unavailable. | |
This parameter is a count of 1-second intervals with one or more CRC-8 anomalies, or one or more LOS defects, or one or more SEF defects, or one or more LPR defects. | |
This parameter is a count of 1-second intervals with one or more ffec anomalies. | |
This parameter is a count of 1-second intervals with one or more fec anomalies. | |
FarEcfLfe | This parameter is a count of interleaved data stream ffec-I anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
This parameter is a count of fast data stream fec-F anomalies (the number of corrected code words) occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. | |
The near-end User_total_cell_count-I performance parameter is a count of the total number of cells in the interleaved data path delivered at the V-C (for ATU-C) or T-R (for ATU-C) interface. | |
UserCellF | The near-end User_total_cell_count-F performance parameter is a count of the total number of cells in the interleaved data path delivered at the V-C (for ATU-C) or T-R (for ATU-C) interface. |
This parameter is a count of interleaved data stream CRC-8 anomalies occurring during the accumulation period. This parameter is subject to inhibiting.See ANSI T1.231 for inhibiting rules. | |
This parameter is a count of interleaved data stream febe-I anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. | |
NearCvfL | This parameter is a count of fast data stream CRC-8 anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
This parameter is a count of fast data stream febe-F anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. | |
NearEciL | This parameter is a count of interleaved data stream fec-I anomalies (the number of corrected codewords) occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
FarEciLfe | This parameter is a count of interleaved data stream ffec-I anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
NearEcfL | This parameter is a count of fast data stream fec-F anomalies (the number of corrected codewords) occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
FarEcfLfe | This parameter is a count of interleaved data stream ffec-I anomalies occurring during the accumulation period. This parameter is subject to inhibiting. See ANSI T1.231 for inhibiting rules. |
NearEcsL | This parameter is a count of 1-second intervals with one or more fec anomalies. |
FarEcsLfe | This parameter is a count of 1-second intervals with one or more ffec anomalies. |
NearEsL | This parameter is a count of 1-second intervals with one or more CRC-8 anomalies, or one or more LOS defects, or one or more SEF defects, or one or more LPR defects. |
NearSesL | This parameter is a count of 1-second intervals with x or more CRC-8 anomalies, or one or more LOS defects, or one or more SEF defects, or one or more LPR defects. The value of x is for further study and might depend upon the data rate. |
NearUasL | This parameter is a count of 1-second intervals for which the ADSL line is unavailable. |
NearSNRMargin | The SNR margin represents the amount of increased received noise (in decibels) relative to the noise power that the system is designed to tolerate and still meet the target BER of 10 7, accounting for all coding (for example, RS FEC) gains included in the design. The SNR margin ranges from -64.0 dB to + 63.5 dB (0.5 dB steps). |
FarAttenuation | The far-end attenuation is the attenuation measured at the far-end. It can be read from the eoc ATN register using the eoc command set. The eoc ATN register is an unsigned integer with a range of 0 to 127. It corresponds to a 0 to 63.5 dB attenuation (0.5 dB steps). |
The attenuation is the difference (in dB) between the power received at the near-end and that transmitted from the far end. Received signal power in dBm is the sum of all data-carrying (that is, b i > 0) DMT-2 sub-carrier powers averaged over a 1-second period. Transmitted signal power is 3.65+10log(S gi 2) dBm, summed over the data-carrying sub carriers. The attenuation ranges from 0 to 63.5 dB with 0.5 dB steps. | |
The far-end SNR margin is the SNR margin measured at the far-end. It can be read from the eoc SNR register using the eoc command set (see Section 8.1.4). The eoc SNR register is coded as a 2's complement signed integer, ranging from -128 to + 127, corresponding to a -64 to + 63.5 dB SNR margin (0.5 dB steps). |
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Posted: Wed Feb 23 11:57:27 PST 2000
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