Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/network:telephony/openSUSE_Tumbleweed/network:telephony.repo
zypper refresh
zypper install libcapi20
Para 16.0 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/network:telephony/16.0/network:telephony.repo
zypper refresh
zypper install libcapi20
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/network:telephony/15.6/network:telephony.repo
zypper refresh
zypper install libcapi20