Number to Dial for Phone Line Diagnostics?

Is there a number that you can dial with your modem to check the metrics of your phone line (bandwidth, noise, etc.)?  I used to know of a 3com number but it is not available anymore becuse of internal corporate change.

I have a 33.6 modem and want to see where the bottleneck is to make an informed decision about upgrading my modem.

Thanks,
Ashu
achapraAsked:
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achapraAuthor Commented:
Edited text of question.
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OttaCommented:
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achapraAuthor Commented:
Otta, thanks for your quick response.  I tried it and found out that my line does not support 56K transfers.  If 56K is not supported, line statistics are not provided.  Is there another number that you know of that will provide this information?

I called 3Com beofre posting my question and they were clueless about this number.  Thanks.

Ashu
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OttaCommented:
After my US Robotics V.90 has ended a call, I can send 'ATI11' to it, and it reports a screen-full of statistics.

I know that there is a similar command for a Diamond SupraExpress 56i modem, but I cannot remember the incantation.
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achapraAuthor Commented:
Thanks for your expedience and expertise.  It is appreciated.

Happy Holidays!  

Ashu
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