+L<FS::phone_device> - Phone device class
+
+L<FS::part_device> - Device definition class
+
+L<FS::phone_avail> - Phone number availability cache
+
+L<FS::lata> - LATA number to name mapping class
+
+L<FS::msa> - MSA number to name mapping class
+
+L<FS::rate_center> - Rate center list (for bulk DID orders)
+
+L<FS::did_vendor> - Bulk DID order vendor class
+
+L<FS::did_order> - Bulk DID order class
+
+L<FS::did_order_item> - Bulk DID order item class
+