1.EF ENTRANCE FACILITIES
The EF more commonly known as the Entrance Facilities consist of the protection devices, connecting hardware, the networks demarcation point or points, cables and any other type of equipment that is planned for use to connect to an AP ( access provider) or PNC ( private network cabling). This subsystem includes connections that occur between inside the building and outside plant cabling.
2.ER EQUIPMENT ROOM
The centralized space that is environmentally controlled for the telecommunications equipment has been regarded as typically more complex when compared to the TR (telecommunications room) or the TE (telecommunications enclosure). This space is usually the place that stores the MC (main cross-connect) which is Distributor C and can also house the ICs (intermediate cross-connects) which is the Distributor B, HCs (horizontal cross-connects) the Distributor A or it could house both.
3.BACKBONE CABLING
Backbone cabling is what provides the interconnection that occurs between the AP (access provider), equipment rooms, telecommunications room’s spaces as well as the entrance facilities. There are currently two subsystems that are associated with backbone cabling that includes the following:
- Cabling System 2 this is backbone cabling that occurs between the IC (intermediate cross-connect) which is Distributor B (DB) and the HC (horizontal cross-connect) which is Distributor A (DA)
- Cabling Subsystem 3 which is backbone cabling that occurs between the MC (main cross-connect) which is Distributor C (DC) and IC (intermediate cross-connect which is Distributor B (DB)
The cables used for such installations include:
- 100 ohm which is twisted-pair cabling that consists of Category 5e, Category 6 or the Category 6A
- Single-mode which is the optical-fiber cabling
- Multimode in the optical-fiber cabling that includes the 850 nm which is laser-optimized (50/125) which is the recommended type or 62.5/125 which is the allowed type
4.TELECOMMUNICATIONS ENCLOSURE (TE) AND TELECOMMUNICATIONS ROOM (TR)
A TE or TR houses terminations of the backbone and horizontal cables that connect to hardware that includes any patch cords or jumpers. These locations can also contain MC or IC for various portions of the backbone cabling system. The Telecommunications Enclosure and Telecommunications Room provides controlled environments to maintain splice closures, connecting hardware and telecommunications equipment.
TE which is the telecommunications enclosures are for specific type implementations and not the general case for most office and commercial based properties. They are intended for use in smaller areas that cannot accommodate a TR and are utilized by the minimum rule which states “one TR per floor.”
5.HORIZONTAL CABLING
Horizontal cabling systems will extend from the telecommunications-information work area outlet onto the TR (telecommunications room) or the TE (telecommunications enclosure). This subsystem includes the patch cords, jumpers, mechanical terminations, horizontal cable in the TE or TR and can incorporate MUTOAs (multiuser telecommunications outlet assemblies), along with CPs (consolidation points). The cable length of horizontal cables cannot exceed 295ft or 90m which is independent of the media type. When MUTOA has been deployed the horizontal twisted-pair cables, maximum length will be decreased.
The typical cable used for horizontal cabling includes the following:
- 4 pair 100 ohms that are shielded or unshielded twisted-pair cabling. This consists of only Category 5e, Category 6 or the Category 6A
- Single-mode “optic fiber” cabling that is a minimum of 2-fiber or higher fiber counts
- Multimode “optic fiber” cabling with a minimum of 2-fiber or higher fiber counts
6.WORK AREA
The WA (Work Area) components will extend from the connector or outlet end of the relating to the horizontal cabling system onto the WA equipment. There need to be at least two telecommunications outlets that are permanent links provided for every work area.
