fiber products
fiber products
fiber products
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Work Area<br />
Shielded<br />
Products<br />
Modular<br />
Patching<br />
Racks and<br />
Cable<br />
Management<br />
Patch Cords,<br />
Plugs and<br />
Cable<br />
S210<br />
Products<br />
S110<br />
Products<br />
S66<br />
Products<br />
Protection<br />
Standards<br />
Overview<br />
Application<br />
Guide<br />
Installation<br />
Practices<br />
Glossary<br />
Index<br />
Tools<br />
and<br />
Testers<br />
Fiber<br />
Products<br />
TELECOMMUNICATIONS ROOM<br />
Telecommunications rooms (TR) are generally considered to be floor serving facilities for horizontal cable distribution.<br />
They may also be used for intermediate and main cross-connects.<br />
Some specifications related to the telecommunications room:<br />
• (TR’s) shall be designed and equipped in<br />
accordance with ANSI/TIA/EIA-569-A.<br />
• Cable stress from tight bends, cable ties,<br />
staples, and tension should be avoided by<br />
well-designed cable management.<br />
• Only standards-compliant connecting<br />
hardware shall be used.<br />
• Application-specific electrical components<br />
shall not be installed as part of the horizontal<br />
cabling.<br />
• Horizontal cable terminations shall not be used<br />
to administer cabling system changes. Instead,<br />
jumpers patch cords, or equipment cords are<br />
required for re-configuring cabling<br />
connections.<br />
The two types of schemes used to connect cabling subsystems to each other and to equipment are known as<br />
interconnections and cross-connections.<br />
Note: A “cross-connect” (a.k.a. distributor) is a facility, whereas a “cross-connection” is a connection scheme. Cross-connections are typically used to provide a means of configuring<br />
individual port connections between the cabling and equipment with multiport outputs (i.e., 25-pair connectors). Interconnections may be used with equipment that has individual output<br />
ports. A cross-connect facility (a.k.a. distributor) may house interconnections, cross-connections, or both.<br />
CROSS-CONNECTION:<br />
A connection scheme using patch cords or jumpers<br />
that attach to connecting hardware on each end.<br />
INTERCONNECTION:<br />
A connection scheme that provides for direct connections<br />
to building cabling from equipment without a patch cord.<br />
Equipment<br />
Cord<br />
Patch Cord<br />
Equipment<br />
Cord<br />
Horizontal<br />
Cross-Connect<br />
Horizontal<br />
Cross-Connect<br />
To the Telecommunications Outlet<br />
To the Telecommunications Outlet<br />
12•9<br />
T H E S I E M O N . C O M P A N Y
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