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08-20-2013
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Created by
davidwallwork44
in Other Network Architecture Subjects
in Other Network Architecture Subjects
08-21-2013
06:50 AM
08-21-2013
06:50 AM
Paolo, Thank you. Am I correct in thinking that the attenuation values are a good indication of line length? Also is a negative noise margin value an indication that the ratio of signal strength to noise is bad for our connection? I am having problems discovering the formula that is used to determine values and also what the optimal values should be. For example, looking at the attentuation, output power and noise margin values, is there a way of determining what is an 'acceptable/correct/expected' amount of crc/es/header errors? Thanks once again in advance for your help, David
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Created by
davidwallwork44
in Other Network Architecture Subjects
08-21-2013
04:53 AM
08-21-2013
04:53 AM
Hello, I have been tasked with trying to discover what is wrong with our current adsl connection. I have issued the show dsl interface atm command and made good progress in understanding the meaning of the output. (I would gladly share my findings by way of a spreadsheet.) But I need an expert to cast their eye over the output to tell me if it is 'bad' or 'good'. Our router is a Cisco 2800 with four atm ports. We are in the UK. It is my understanding that the line from the exchange to our building is quite long and the connection between the wall and the router is over 4 metres. I also noticed a couple of LOM defects on atm0/0/0 and atm0/2/0. Thank you in advance. ATM0/0/0 Alcatel 20150 chipset information ATU-R (DS) ATU-C (US) Modem Status: Showtime (DMTDSL_SHOWTIME) DSL Mode: ITU G.992.1 (G.DMT) Annex A ITU STD NUM: 0x01 0x1 Vendor ID: ' ' 'TSTC' Vendor Specific: 0xDBB0 0x0000 Vendor Country: 0x04 0xB5 Capacity Used: 100% 97% Noise Margin: -2.5 dB 7.0 dB Output Power: 20.0 dBm 12.0 dBm Attenuation: 47.0 dB 25.0 dB FEC ES Errors: 0 0 ES Errors: 939989 36 SES Errors: 0 0 LOSES Errors: 0 0 UES Errors: 0 0 Defect Status: LOM None Last Fail Code: None Watchdog Counter: 0x40 Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x15 Interrupts: 2654 (1 spurious) PHY Access Err: 0 Activations: 2 LED Status: ON LED On Time: 100 LED Off Time: 100 Init FW: ASW_init_3_8_131.bin Operation FW: ASW_R3_8_131.bin FW Source: embedded FW Version: 3.8.131 Interleave Fast Interleave Fast Speed (kbps): 6720 0 768 0 Cells: 200940294 0 1084868157 0 Reed-Solomon EC: 32801 0 529 1 CRC Errors: 3612 0 81 1 Header Errors: 54955 0 62 1 Bit Errors: 0 0 BER Valid sec: 0 0 BER Invalid sec: 0 0 LOM Monitoring : Disabled DMT Bits Per Bin 000: 0 0 0 0 0 0 0 8 7 9 B B C C C C 010: C B B B B B B A A 9 9 8 8 6 0 0 020: 0 0 0 0 0 0 6 6 6 7 8 8 9 9 9 A 030: A B B C C C C D D D D D D E E E 040: 0 E 2 E E E E E D E E D D D D D 050: D D D D D D D D D D D D D D D D 060: D C D D D D D D D D D D D D D B 070: C C C D D C C C C C C C C A C C 080: C C C C C B B B B B B 9 B B B B 090: B B B B A A A A A 9 A A 9 9 9 9 0A0: A A A 9 A A 9 8 9 9 9 9 9 9 9 9 0B0: 9 9 8 8 8 7 8 8 8 8 9 8 8 8 8 6 0C0: 6 6 5 5 5 5 5 5 5 5 5 5 5 5 5 5 0D0: 5 5 5 5 5 5 5 5 5 4 5 4 4 4 4 3 0E0: 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 0F0: 4 4 3 3 2 0 0 0 0 0 0 0 0 0 0 0 DSL: Training log buffer capability is not enabled GLASAIRA# show dsl interface atm 0/1/0 ATM0/1/0 Alcatel 20150 chipset information ATU-R (DS) ATU-C (US) Modem Status: Showtime (DMTDSL_SHOWTIME) DSL Mode: ITU G.992.1 (G.DMT) Annex A ITU STD NUM: 0x01 0x1 Vendor ID: ' ' 'TSTC' Vendor Specific: 0xDBB0 0x0000 Vendor Country: 0x04 0xB5 Capacity Used: 100% 98% Noise Margin: 5.0 dB 7.0 dB Output Power: 20.0 dBm 12.0 dBm Attenuation: 49.0 dB 25.5 dB FEC ES Errors: 0 0 ES Errors: 940268 36 SES Errors: 0 0 LOSES Errors: 0 0 UES Errors: 0 0 Defect Status: None None Last Fail Code: None Watchdog Counter: 0xF6 Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x15 Interrupts: 2654 (0 spurious) PHY Access Err: 0 Activations: 2 LED Status: ON LED On Time: 100 LED Off Time: 100 Init FW: ASW_init_3_8_131.bin Operation FW: ASW_R3_8_131.bin FW Source: embedded FW Version: 3.8.131 Interleave Fast Interleave Fast Speed (kbps): 6400 0 704 0 Cells: 201004196 0 994723430 0 Reed-Solomon EC: 43150 0 480 1 CRC Errors: 145 0 9 1 Header Errors: 133 0 4 1 Bit Errors: 0 0 BER Valid sec: 0 0 BER Invalid sec: 0 0 LOM Monitoring : Disabled DMT Bits Per Bin 000: 0 0 0 0 0 0 0 8 8 9 9 B B B B 9 010: 6 8 B B B B B A A 9 9 9 7 6 0 0 020: 0 0 0 0 0 0 5 6 7 7 8 8 9 9 9 A 030: A B B B C C C C C C C C C C C D 040: 0 D D 2 D D D D D D C C C C C C 050: C C C C C C C C C C C C C C C C 060: C C C C C C C C C C C C C C C B 070: C B C B B B B B B B B B B B B B 080: B B B B B B B B B B B A A B A A 090: A A A A A A A A A A A A A A A A 0A0: A 9 A 9 9 9 9 9 9 9 9 9 9 9 9 9 0B0: 9 9 9 9 9 9 9 9 8 8 8 8 4 8 8 6 0C0: 6 6 6 6 5 6 6 5 5 5 5 5 5 5 5 5 0D0: 5 5 4 2 4 4 4 4 4 4 4 4 4 4 4 4 0E0: 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 0F0: 3 4 3 3 3 0 0 0 0 0 0 0 0 0 0 0 DSL: Training log buffer capability is not enabled GLASAIRA#show dsl interface atm 0/2/0 ATM0/2/0 Alcatel 20150 chipset information ATU-R (DS) ATU-C (US) Modem Status: Showtime (DMTDSL_SHOWTIME) DSL Mode: ITU G.992.1 (G.DMT) Annex A ITU STD NUM: 0x01 0x1 Vendor ID: ' ' 'TSTC' Vendor Specific: 0xDBB0 0x0000 Vendor Country: 0x04 0xB5 Capacity Used: 99% 98% Noise Margin: -1.0 dB 6.0 dB Output Power: 20.0 dBm 12.0 dBm Attenuation: 48.0 dB 25.0 dB FEC ES Errors: 0 0 ES Errors: 940292 36 SES Errors: 0 0 LOSES Errors: 0 0 UES Errors: 0 0 Defect Status: LOM None Last Fail Code: None Watchdog Counter: 0xFF Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x15 Interrupts: 2654 (0 spurious) PHY Access Err: 0 Activations: 2 LED Status: ON LED On Time: 100 LED Off Time: 100 Init FW: ASW_init_3_8_131.bin Operation FW: ASW_R3_8_131.bin FW Source: embedded FW Version: 3.8.131 Interleave Fast Interleave Fast Speed (kbps): 6752 0 800 0 Cells: 200915940 0 1130423255 0 Reed-Solomon EC: 34540 0 696 2 CRC Errors: 7796 0 5 3 Header Errors: 5985 0 4 1 Bit Errors: 0 0 BER Valid sec: 0 0 BER Invalid sec: 0 0 LOM Monitoring : Disabled DMT Bits Per Bin 000: 0 0 0 0 0 0 0 8 8 9 B B C C C C 010: C C C C B B B B A A 9 9 8 7 0 0 020: 0 0 0 0 0 0 4 4 5 5 6 7 7 7 8 8 030: 9 9 A A B B B C C C D D D D E E 040: 0 E E E E D D 2 E E E E E E E E 050: E E E E E E E E E E E E E C D B 060: D 6 E E E D E E E E E D D D D B 070: D D D D D D D D D D D D D 9 C C 080: D D D D C C C C C B C 8 B A A B 090: C B B B A A A B A 6 A A 9 A A A 0A0: A A A 9 9 A 8 6 9 A A A 9 9 9 9 0B0: 9 9 9 9 8 6 8 8 8 8 8 8 7 8 7 6 0C0: 6 6 4 4 2 2 2 4 5 5 5 5 5 5 6 6 0D0: 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 5 0E0: 5 5 5 4 5 4 5 5 4 4 4 4 4 4 4 4 0F0: 4 4 4 4 4 0 0 0 0 0 0 0 0 0 0 0 DSL: Training log buffer capability is not enabled GLASAIRA#show dsl interface atm 0/3/0 ATM0/3/0 Alcatel 20150 chipset information ATU-R (DS) ATU-C (US) Modem Status: Showtime (DMTDSL_SHOWTIME) DSL Mode: ITU G.992.1 (G.DMT) Annex A ITU STD NUM: 0x01 0x1 Vendor ID: ' ' 'TSTC' Vendor Specific: 0xDBB0 0x0000 Vendor Country: 0x04 0xB5 Capacity Used: 100% 99% Noise Margin: 3.0 dB 6.0 dB Output Power: 20.0 dBm 12.0 dBm Attenuation: 48.0 dB 26.0 dB FEC ES Errors: 0 0 ES Errors: 940333 36 SES Errors: 0 0 LOSES Errors: 0 0 UES Errors: 0 0 Defect Status: None None Last Fail Code: None Watchdog Counter: 0x1D Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x15 Interrupts: 2654 (0 spurious) PHY Access Err: 0 Activations: 2 LED Status: ON LED On Time: 100 LED Off Time: 100 Init FW: ASW_init_3_8_131.bin Operation FW: ASW_R3_8_131.bin FW Source: embedded FW Version: 3.8.131 Interleave Fast Interleave Fast Speed (kbps): 6144 0 704 0 Cells: 201014958 0 994786830 0 Reed-Solomon EC: 42151 0 1388 4 CRC Errors: 380 0 73 3 Header Errors: 338 0 55 0 Bit Errors: 0 0 BER Valid sec: 0 0 BER Invalid sec: 0 0 LOM Monitoring : Disabled DMT Bits Per Bin 000: 0 0 0 0 0 0 0 8 7 9 A B B B B A 010: 8 6 8 A B B B B B A 9 9 7 6 0 0 020: 0 0 0 0 0 0 5 6 7 7 8 8 9 9 9 9 030: A A A B B B B B B B B B C C C C 040: 0 B B C B B B 2 C B C C B B B B 050: B B B B B B B B B B B B B B B B 060: B B B B B B B B B B B B B B B B 070: B B B B B B B B B B B B B A B B 080: B B B B B B B A A A A 9 A A A A 090: A A A A A A A A A 9 A A 9 A A 9 0A0: 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 0B0: 9 9 9 9 9 8 9 9 8 8 8 7 4 7 8 6 0C0: 4 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 0D0: 5 5 4 2 4 5 5 5 5 5 5 5 5 4 4 4 0E0: 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 0F0: 4 4 4 3 3 0 0 0 0 0 0 0 0 0 0 0 DSL: Training log buffer capability is not enabled
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Created by
davidwallwork4425
in Other Network Architecture Subjects
08-21-2013
08-21-2013
Paolo,Thank you. Am I correct in thinking that the attenuation values
are a good indication of line ...
Created by
davidwallwork4425
in Other Network Architecture Subjects
08-21-2013
08-21-2013
Hello,I have been tasked with trying to discover what is wrong with our
current adsl connection. I h...
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| Date Registered | 08-20-2013 04:20 AM |
| Date Last Visited | 04-17-2019 08:43 AM |
| Total Messages Posted | 2 |
