L<FS::pkg_svc> - Class linking package definitions (see L<FS::part_pkg>) with
service definitions (see L<FS::part_svc>)
+L<FS::rate> - Rate plans for call billing
+
+L<FS::rate_region> - Rate regions for call billing
+
+L<FS::rate_prefix> - Rate region prefixes for call billing
+
+L<FS::rate_detail> - Rate plan detail for call billing
+
L<FS::agent> - Agent (reseller) class
L<FS::agent_type> - Agent type class