Do you know the Model number of this Viking Product
http://www.vikingelectronics.com/products/faxdata/faxj-300.html
It is not that much money, I think ~$150.00.
This would take CO line before KXTD and give you two analog lines to plug into CO1 & CO2 (for example).
You will have to set dip swtiches properly.
Regards, Joel Winarske
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