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27th November 2006 14:42 #1
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27th November 2006 16:49 #2
30*C . - 24*
55-60%, 80%
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- ISO/IEC 11801 Ed. 2:2002
- ISO/IEC 61000-2-2
- ISO/IEC 61000-5-2
- IEC 60603-7-5
- EN 50173
- EN 50174 - 1, 2
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27th November 2006 19:47 #3
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Last edited by okli; 27th November 2006 at 20:02.
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27th November 2006 21:07 #4
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Cisco:
If there is only one wiring closet in a building, or if the wiring closet serves as the MDF, then the floor on which it is located must be able to bear the load specified by the installation instructions included with the required equipment, with a minimum capability of 4.8 kPA (100 lb/ft²
. Where the wiring closet serves as an IDF, the floor must be able to bear a minimum load of 2.4 kPA (50 lb/ft²
. Whenever possible, the room should have a raised floor, in order to accommodate incoming horizontal cables that run from the work areas. If this is not possible, then it should have a 30.5 cm ladder rack installed in a configuration designed to support all proposed equipment and cable. Floor coverings should be tile, or some other type of finished surface. This helps control dust, and shields equipment from static electricity.
A minimum of two walls should be covered with 20mm A-C plywood that is at least 2.4m high. If the wiring closet serves as the MDF for the building, then the telephone point of presence (POP), may be located inside the room. In such a case, the interior walls of the POP site, behind the PBX, should be covered from floor to ceiling with 20mm plywood, with minimum of 4.6 m of wall space provided for the terminations and related equipment. In addition, fire prevention materials that meet all applicable codes (e.g. fire-rated plywood, fire-retardant paint on all interior walls, etc.) should be used in the construction of the wiring closet. Rooms must not have a dropped, or false, ceiling. Failure to observe this specification could result in an insecure facility, allowing possible unauthorized access.
Temperature and humidity
The wiring closet should include sufficient HVAC to maintain a room temperature of approximately 21 C, when all LAN equipment is in full operation. There should be no water or steam pipes running through or above the room, with the exception of a sprinkler system, which may be required by local fire codes. Relative humidity should be maintained at a level between 30%-50%. Failure to adhere to these particular specifications could result in serious corrosion of the copper wires that are contained within the UTP and STP. Such corrosion would deter efficient functioning of the network.
Lighting fixtures and power outlets
If there is only one wiring closet in a building, or if the closet serves as the MDF, it should have a minimum of two dedicated, non-switched, AC duplex electrical outlet receptacles, each on separate circuits. It should also have at least one duplex power outlet positioned every 1.8 m along each wall of the room, and should be positioned 150 mm above the floor. A wall switch, that controls the rooms main lighting, should be placed immediately inside the door.
While fluorescent lighting should be avoided for cable pathways because of the outside interference that it generates, it can be used in wiring closets with proper installation. Lighting requirements for a telecommunications closet specify a minimum of 500 lx (brightness of light equal to 50 foot candles), and that light fixtures be mounted a minimum of 2.6 m above the floor.
Room and equipment access
The door of a wiring closet should be at least .9 m wide, and should swing open out of the room, thus ensuring an easy exit for workers. The lock should be located on the outside of the door, but allow anyone who is on the inside to exit at any time.
A wiring hub and patch panel may be mounted to a wall with a hinged wall bracket, or with a distribution rack. If the choice is a hinged wall bracket, the bracket must be attached to the plywood that covers the underlying wall surface. The purpose of the hinge is to allow the assembly to swing out so that workers and repairmen can easily access the back side of the wall. Care must be taken, however, to allow 48 cm for the panel to swing out from the wall.
If the choice is a distribution rack, then it must have a minimum 15.2 cm of wall clearance for the equipment, plus another 30.5-45.5 cm for physical access by workmen and repairmen. A 55.9 cm floor plate, used to mount the distribution rack, will provide stability, and will determine the minimum distance for its final position.
If a wiring closet serves as an MDF, all cable running from it - to IDFs, computers, and communications rooms on other floors of the same building - should be protected by 10.2 cm conduit or sleeved core. Likewise, all such cable running into the IDFs should be run through the same 10.2 cm conduit or sleeved cores. The exact amount of conduit that is required is determined by the amount of fiber optic, UTP, and STP cable that must be supported in each wiring closet, computer, or communications room. Care should be taken to include additional lengths of conduit in order to provide for future growth. To meet this specification, a minimum of two excess sleeved cores or conduits should be kept in each wiring closet. Where construction permits, all conduit and sleeved core should be kept to within 15.2 cm of the walls.
All horizontal cabling that runs from work areas to a wiring closet should be run under a raised floor. When this is not possible, the cabling should be run through 10.2 cm sleeves that are placed above door level. In order to ensure proper support, the cable should run from the sleeve directly onto a 30.5 cm ladder rack in the room. When used in this manner, to support cable, the ladder rack should be installed in a configuration which supports the equipment layout.
Finally, any wall/ceiling openings that provide access for the conduit, or sleeved core, must be sealed with smoke and flame-retardant materials that meet all applicable codes., , .
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27th November 2006 21:36 #5
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27th November 2006 22:01 #6Registered User
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27th November 2006 22:31 #7
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28th November 2006 00:45 #8Registered User
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28th November 2006 08:27 #9
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, - , .. , - ( )ignore list:Java,velio,jaredharet,gochev.george,Nit rogeniumQuis custodiet ipsos custodes?
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28th November 2006 09:00 #10
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General
Door entrance to server room requires a badge to get in and a badge to get out
Ballistics-proof walls, doors, and windows
24-hour physical security monitors all cameras, door positions, and badge access areas
Redundant off-site monitoring of all security systems
Camera on each doorway
Lightning protection throughout the perimeter, rooftop, and electrical and mechanical support infrastructure
Building strategically located outside of severe weather and seismic zones (if possible).
Separate printer room
Separate operators room (visual contact with server room and printer room if possible).
Environment
60 centimeters raised anti static electricity floor to provide conditioned air from below to push hot air up for more efficient and effective cooling of computer equipment and prevent static electricity to cause damage.
Security cameras watching every door, aisle, rack, and cabinet.
Temperature observation system
Humidity observation system
Fire detection and extinguish system
Intruder alarm system
Two complete and separate air conditioning systems each fully capable of maintaining temperature and humidity.
Computer room air conditioning units positioned around the data center.
- Filter the air to remove dust and lint
- Humidity the air to a finite set point to reduce static electricity
Grounding connections on all racks.
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28th November 2006 11:42 #11... ? ? ?
Originally Posted by The Penalty
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Originally Posted by The Penalty
ignore list:Java,velio,jaredharet,gochev.george,Nit rogeniumQuis custodiet ipsos custodes?
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28th November 2006 14:45 #12
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, . , , , , . .Last edited by okli; 28th November 2006 at 14:58.
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3rd July 2017 09:33 #13Registered User
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3rd July 2017 10:12 #14
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3rd July 2017 10:15 #15Registered User
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3rd July 2017 10:15 #16




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