I haven't been able to find an online source for instructions for the Dialer Buddy DLM22 decoder. It is supposed to detect DTMF and DP pulses. Anyone know where I can find a manual for it? Thanks!
Try contacting the company that made it. Telesoft Inc.
https://www.telesoft.com/?gclid=CILjt_jf8NMCFV62wAodXH4IhQ
Contacted them by email last week. I have not had a response yet.
Use the telephone. Most companies ignore emails.