In my opinion and based on my short experience with ADSL on Cisco routers, the only values that are relevant for me are:
Noise Margin: which represents, as the name says it, how far is your signal from the noise, the higher the better, the lowest recommended value would be around 20%. Attenuation: the lower the better, anything below 10-15 dB, the highest this value is it means there may be problems in the hard line, or perhaps you're too far from the DSLAM. These values are of course correlated to the others (Capacity, Output power) everything is a function of line quality, physically talking. The errors may be related to a poor quality. Some workarounds can be setting the DSL mode to some specific mode instead of automatic, but you should know what is the best, you may talk with your provider and ask about this, when too far from the DSLAM or the line quality is poor, lowering the speed of the link may help improve those values too. As I said, this is only "field" knowledge, is not based on any "scientific" facts, just mere experience. Feel free to correct me if I'm wrong about something, I'd be glad to learn some more about this Hope this helps Ziv -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Basha Sent: Monday, February 02, 2009 7:54 AM To: cisco-nsp@puck.nether.net Subject: [c-nsp] show dsl int atm 0 Hi Guys, I need some assistance trying to understand the out put of show dsl int atm 0 command. Specifically the 'bit errors' column. ATM0/0/0 Alcatel 20190 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: 'STMI' 'GSPN' Vendor Specific: 0x0000 0x0008 Vendor Country: 0x0F 0xFF Capacity Used: 15% 67% Noise Margin: 21.0 dB 8.0 dB Output Power: 13.5 dBm 2.0 dBm Attenuation: 23.0 dB 11.5 dB Defect Status: None None Last Fail Code: None Watchdog Counter: 0x2A Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x00 Interrupts: 3834 (0 spurious) PHY Access Err: 0 Activations: 1 LED Status: OFF LED On Time: 0 LED Off Time: 0 Init FW: embedded Operation FW: embedded FW Version: 2.542 Interleave Fast Interleave Fast Speed (kbps): 0 1536 0 512 Cells: 0 3404282 0 659208107 Reed-Solomon EC: 0 0 0 0 CRC Errors: 0 0 0 1 Header Errors: 0 0 0 0 Bit Errors: 0 48896 BER Valid sec: 0 7725096 BER Invalid sec: 0 0 LOM Monitoring : Disabled Customer is running video and is seeing lots of packet drops Thanks _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/