Install libdevice-modem-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libdevice-modem-perl
Description:
Perl class to interface generic modems (AT-compliant)
Device::Modem class implements basic AT (Hayes) compliant device abstraction. It can be inherited by sub classes (as Device::Gsm), which are based on serial connections.
Homepage: http://search.cpan.org/~cosimo/Device-Modem/
Version: 1.57-1
Section: universe/perl