Install libss7-2.0 by entering the following commands in the terminal:
sudo apt update sudo apt install libss7-2.0
Description:
Signalling System 7 (ss7) library
A userspace library that provids SS7 protocol services to applications. It has a working MTP2, MTP3, and ISUP for ITU and ANSI style SS7, however it was written in a manner that will easily allow support for other various national specific variants in the future. For a working reference implementation, see the various link test programs, as well as the Asterisk Open Source PBX. . C implementation of the Signalling System 7 (ss7) telephony protocol.
Homepage: http://downloads.asterisk.org/pub/telephony/libss7/
Version: 2.0.0-2
Section: universe/libs