Hi,
        I'm currently trying to develop a application which involve some
telephone communications. I've decided to use CML's CMX868 (formerly
from MX-COM).
        Now, my problem is that someone (Hi there Dennis) told me to
make a power supply to emulate the phone line in order to be able to
establish communication between the two modems. I've succeeded on this
issue and successfully connected two computers via modems.
        The circuit is a simple LM317 in current regulator configuration
and another one in series in volt reg configuration, this will provide
9V with 13mA max.

        On the modem circuit, I've used CML recommended circuit for USA
and EUROPE with caller ID feature. The transformer is a 60ohm
(multimeter says so:).

        When I connect this circuit to the phone line or to the phone
line simulator it draws a lot of current, so it brings the PSU down and
I guess that's why it doesn't work.

        Any tips?

Mauricio Jancic
Janso Desarrollos
Microchip Consultant
(54) - 11 - 4542 - 3519

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