The
industry standard term for a network installation serving a relatively small
area (such as a structured cabling installation serving a building) is a local
area network (LAN). There are also metropolitan networks (MAN) and geographic
networks (WAN).
Structured
cabling systems typically include: entrance structures; vertical and horizontal
back paths; vertical and horizontal backbone cables; horizontal paths;
horizontal cables; work points; technical rooms; telecommunication cabinets;
cross-connect structures; multi-user telecommunications outlet groups (MUTOA);
transition points; and consolidation points.
The
entrance structure includes the wiring components necessary to provide a means
of connecting external service structures to the wiring of the premises. This
may include service entry paths, cables, connection hardware, circuit
protection devices, and transition hardware.
An
entrance structure houses the passage from the outside of the system wiring to
the wiring approved for intra-building construction. This usually involves
transitioning to the fire retardant cable. The access structure is also the
demarcation of the network between the SP and the cabling of the customer's
premises (if necessary). The national and regional electrical codes regulate
the positioning of the electrical protection devices at this point.
No comments:
Post a Comment