Telecom Infrastructure Wiring Standards Choose from the list below to view infrastructure wiring standards for Telecommunication Systems: 270500 - Common Work Results for Communications 270526 - Grounding and Bonding for Communication Systems 270528 - Pathways for Communication Systems 270536 - Cable Trays for Communication Systems 271100 - Communications Equipment Room Fittings 271300 - Communications Backbone Cabling 271500 - Communications Horizontal Cabling