From SME Server

Spectrum2 is a set of libraries for transport back ends used in ejabberd. Transports for Facebook, IRC, GTalk Skype, XMPP are available.

For SME 9.x

/sbin/e-smith/db yum_repositories set spectrum2 repository \
BaseURL http://copr-be.cloud.fedoraproject.org/results/mcepl/spectrum2/epel-6-\$basearch/ \
EnableGroups no \
GPGCheck no \
Name "spectrum2" \
Visible yes \
status disabled

After adding it to the database updating the configuration file is required by issueing:

signal-event yum-modify