• comp.dcom.cabling (newsgroup)
• comp.dcom.cell-relay (newsgroup)
• comp.dcom.fax (newsgroup)
• comp.dcom.frame-relay (newsgroup)
• comp.dcom.isdn (newsgroup)
• comp.dcom.lans (category)
• comp.dcom.modems (newsgroup)
• comp.dcom.net-analysis (newsgroup)
• comp.dcom.net-management (newsgroup)
• comp.dcom.servers (newsgroup)
• comp.dcom.sys (category)
• comp.dcom.telecom (category)
• comp.dcom.videoconf (newsgroup)
• comp.dcom.wan (newsgroup)
• comp.dcom.xdsl (newsgroup)