Cisco 877 DSL Line Noise

Answered Question
Aug 11th, 2009
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Greetings, we have recently installed an 877 which fails to sync with the DSL circuit, following debugging of the ATM interface the following error is noted.


000452: *Mar 1 01:51:15.919 GMT: DSL(ATM0): Open failed: Req. min. rate + noise margin + PSD not possible on the line - retrying


Whilst i appreciate this may be a problem with the DSL circuit a BT 2Wire Router connects without issue as per the attached image. I have also tried forcing the DSL operating mode to both ADSL2 and ADSL2+ without success.


Would i be correct in assuming that the line is too noisy for the 877 to sync upto? Could i also ask if anyone has experienced a similar issue in the past?


Regards



Correct Answer by paolo bevilacqua about 7 years 8 months ago

Can you try 3.0.33 firmware from ftp://ftp.cisco.com/pub/access/800


failing that you will need help from cisco TAC.

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exonetinf1nity Tue, 08/11/2009 - 05:00
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Thank you for that, i wasnt able to find these files anywhere on cisco.com


Thank you, i shall let you know if it resolves the issue.


Regards

paolo bevilacqua Wed, 08/12/2009 - 04:16
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Very good, thank you for the nice rating and good luck!

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