Install libpri1.4 by entering the following commands in the terminal:
sudo apt update sudo apt install libpri1.4
Description:
Primary Rate ISDN specification library
C implementation of the Primary Rate ISDN specification. It was based on the Bellcore specification SR-NWT-002343 for National ISDN. As of May 12, 2001, it has been tested work with NI-2, Nortel DMS-100, and Lucent 5E Custom protocols on switches from Nortel and Lucent
Homepage: http://www.asterisk.org/
Version: 1.6.0-1
Section: universe/libs