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Originally posted by goldenhtr:
This may work as well.

web page
That device does not actually record the calls. It will allow you to do station side recording to another device.

I have used this before for CO lines:
https://www.digital-loggers.com/f8.html
The device itself does not store the recording, but with the software you can record to a PC. It connects to a CO line and even logs DTMF on outgoing and Caller ID for incoming. I used ot on a partner system (customer bought it).