Installation in telephone systems
PhoneBlock can also be integrated into telephone systems. As a telephone system tends to be used for business purposes, please note the Notes regarding the commercial use of PhoneBlock, in particular the disclaimer. The scripts for the telephone system integration are contributions from the PhoneBlock community. So if you have any questions/problems with them, please contact the respective developer directly.
3CX
To use PhoneBlock in the telephone system of 3CX, have a look at the project phoneblock-for-3cx.
Other
Have you written an integration for another telephone system? Then let me know so that I can set a link to your project.