search for: balnac

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2006 Jan 14
4
tuning an x100p in Australia for echocancellation
...t; > can do impedence matching on the line, or of a modification to the card > > (eg component swapping) which could allow some manual adjustment? > > Twenty years ago, the telphone companies in the US had several types of > hardware devices available for impedence matching, line balnacing, etc. > The devices were used to compensate for several different problems that > would be too costly to fix through conventional means. I don't have any > clue where one might find those boxes today since those types of issues > have essentially disappeared due to the heavy use...
2006 Jan 13
1
tuning an x100p in Australia for echo cancellation
I have an x100p which suffers from echo (no surprise there apparantly :), and a few of the things I've read about tuning out echo say the first thing to get right is the tx and rx gain, and for that you need a few different types of test lines from the telco (Telstra, Optus, whatever). Does anyone have any numbers in Australia for such lines? I think they just need to send out a tone of a