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DTMF specifications

Discussion in 'Electronic Design' started by CSB, Apr 21, 2004.

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  1. CSB

    CSB Guest

    I'm building a pc-based DTMF decoder that uses Mitel's MT8870
    integrated decoder chip. But there are two 'versions' of the chip, the
    8870D and the 8870D-1. One is for the BT specification (british telecom),
    and the other for CEPT spec. In Canada, I suppose CEPT is used? Or are
    there really no differences?
    Thanks for any help,
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