User`s manual

NetDoc™ User’s Manual B-11 Rev B
TDU
An air-blown fiber-optic tube cable (conduit) can contain up multiple fiber-optic tube cells,
which can be joined in tube distribution units (TDUs), or junction boxes. TDUs replace
conventional fiber splice hardware at tube-cable transitions and branching locations to provide
point-to-point connectivity between the computer room or network hub and the application.
Tube Distribution Units (TDUs), or junction boxes, are wall-mounted enclosures or rack-
mounted panels used at tube cable transitions or branching locations. Tubes are joined
together using push-fit connectors. This results in a pathway between the network hub and
workstations or other sites and functions supported by the tube cable infrastructure.
T
DUs are not visible on the Navigation Tree. They can only be viewed by clicking the TDU radio button
from within the Space where the rack resides. When a TDU is added, the Navigation Tree indicates a (-)
next to the icon for the Space.
Telecommunications Closets (TC)
See Telecommunications Space.
Telecommunications Ground Busbar
A telecommunications ground busbar typically resides in a TS that does not have a grounding
source and is connected to the TMGB by a grounding conductor. It is also used to ground all
telecommunications equipment and cabling that requires a grounding connection.
Telecommunications Main Ground Busbar (TMGB)
A telecommunications main grounding busbar (TMGB) is the busbar tied directly to the
grounding source and is used to ground all telecommunications equipment and cabling that
require a grounding connection.
Telecommunicaton Room (TR)
A room where all workstation cabling runs to.