CMU Communicator

Telephony Hardware HOWTO

1 main | 2.1 requirements | 2.2 install | 3.1 manuals | 3.2 quick guide | 4.1 downloads | 4.2 quick fixes | 5 links
The telephone interface is handled by the following Gentner box:

It has a line-level input and output that are connected to a regular
PC sound card (e.g. soundblaster).

In order to receive status signals (e.g. on/off hook indicator) and send
control signals to the gentner box, we use a National Instruments
digital I/O card.  The product ID is a PC-DIO-24 and the National
Instruments web site is  In order to get the
signals into the PC-DIO-24 card, we use the ER-8 accessory box.

You have to wire a custom cable from the ER-8 box to the back of the
Gentner box.

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