Telecommunications Closet (TC)

Definition - What does Telecommunications Closet (TC) mean?

Telecommunications closet (TC) is a small room that encloses telecommunications network systems and devices.

A TC is also known as a wiring closet and often contains access to wiring conduits large enough for service personnel to access in order to service or install cabling networks within buildings.


Techopedia explains Telecommunications Closet (TC)

TC systems and devices include:

  • Backbones, distribution panels, cross-connects
  • Horizontal cabling termination points
  • Circuit administration points
  • Auxiliary workstation power supply

TCs are allocated by network size. For example, hospitals with large networks spanning multilevel buildings have TCs on every floor.

Basic TC requirements include:

  • At least one TC per floor for large networks
  • Several TCs if one floor exceeds 1,000 square meters
  • TC size based on serviced areas
  • At least one meter equipment and cross-connect clearance
  • Appropriate grounding and bonding for cable shields and metallic pathways
  • Minimum ceiling height: 2.6 meters (false ceilings forbidden)
  • Fully open and lockable doors (center posts or door sills forbidden)
  • Fireproofing of all terminated backbone pathways
  • Multiple TC interconnectivity by floor
  • Door opening direction cannot impact equipment access or movement
  • Preventative measures regarding static electricity and dust elimination
  • Close proximity to served area center for reduced horizontal cable length (maximum: 90 meters)

Popular White Papers

Techopedia Newsletter Sign-Up

Get Techopedia delivered to your inbox!