Planning For Technology In New Buildings · you need to “talk the talk”. We are going to...
Transcript of Planning For Technology In New Buildings · you need to “talk the talk”. We are going to...
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© 2001 Information Partners, Inc.
Building The 21st Century LibraryPlanning For Technology In New
Buildings
Jim BarrentineInformation Partners
Technology & Management Solutionsfor Libraries
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© 2001 Information Partners, Inc.
Jim BarrentineInformation Partners, Inc.
2697 Euclid Hts. Blvd.Cleveland, OH 44106216-371-2415 (voice)216-932-4980 (fax)[email protected]
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© 2001 Information Partners, Inc.
Overview◆ We are going to discuss the vocabulary
you need to “talk the talk”.◆ We are going to discuss specific
technologies and how to make yourbuilding flexible for the future.
◆ We are not going to discusstechnologies that do not affect thebuilding.
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© 2001 Information Partners, Inc.
Foreword◆ We can’t all be nuclear submarine
officers.
◆ Sherlock Holmes thought the sunrevolved around the earth.
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© 2001 Information Partners, Inc.
Libraries & Technology◆ Technical Services◆ Circulation◆ Public access◆ Reference◆ Business operations
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© 2001 Information Partners, Inc.
Technology Devices◆ PCs◆ Printers◆ Thin clients◆ Self checkout machines◆ Telephones
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© 2001 Information Partners, Inc.
They All Need◆ Space◆ Data◆ Electrical power◆ Cooling (aka HVAC)
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© 2001 Information Partners, Inc.
Space
This you should have taken care of inyour building program.
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© 2001 Information Partners, Inc.
Communications Basics◆ Computers are binary devices
– 1s and 0s– On and off– Positive and negative– Yes and no
◆ BInary DigiT or BIT◆ 8 bits make a byte
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© 2001 Information Partners, Inc.
Communications Basics◆ Character encoding
– Morse codeVariable length - dots and dashes
– Telex and telegramsBaudot - 5 bits - 32 characters
– ASCII - 8 bits - 256 characters– ALA - 8 bits - 192 characters
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© 2001 Information Partners, Inc.
Communications Basics◆ Character encoding
– AU:SMITHA 01000001U 01010101: 00111010S 01010011M 01001101I 01001001T 01010100H 01001000
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© 2001 Information Partners, Inc.
Communications Basics◆ Speed
– Measured in bits per second or baudOriginal OCLC 2400Modern modems 56KLANs 10 or 100MbpsISDN 128KT1 1.5MbpsATM 155Mbps
– Also referred to as bandwidth
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© 2001 Information Partners, Inc.
Communications Basics◆ Why is speed so important?
– A single web page can contain200,000 characters or about 2megabits
– Download timesAt 9600 210 secondsAt 56K 35 secondsAt T1 < 2 seconds
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© 2001 Information Partners, Inc.
?
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© 2001 Information Partners, Inc.
Local Area Networks
LAN
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The Time before LANsDirectly connected RS-232 terminals
Mainframe
Terminals
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© 2001 Information Partners, Inc.
The Time Before LANsRemotely multiplexed RS-232 terminals
Mainframe
Terminals
Multiplexor Multiplexor
Modem Modem
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© 2001 Information Partners, Inc.
LANs◆ What is a LAN, anyway?
– A LAN connects computers in aworkgroup, department or building.
– A communication network used by asingle organization over a limiteddistance which permits users to shareinformation and resources.
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© 2001 Information Partners, Inc.
LANs◆ Why do I need to know this stuff?◆ Why would I want a LAN?
– Link PCs to your local system– Share printers and disk storage– Share networked applications– Share CDROM databases– Provide Internet access
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© 2001 Information Partners, Inc.
LANs Link PCs to your local system
Local System
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LANsShare printers and disk storage
Network Server
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© 2001 Information Partners, Inc.
Introduction◆ Share network applications
– Electronic mail– Applications– Metered software
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© 2001 Information Partners, Inc.
LANsShare CDROM databases
Network Server CD Tower
CD Server
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© 2001 Information Partners, Inc.
LANsProvide Internet access
SeriesRouter
CSU/DSU
Internet
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Types of LANs
A rose by any other name...
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Types of LANs◆ What type of LAN do you have?
– 10BaseT– Ethernet– NT– Client - Server
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© 2001 Information Partners, Inc.
Types of LANs◆ What is your ...?
– Cabling infrastructure?10BaseT
– Frame type and collision detectionmechanism?
Ethernet
– Network operating system?NT
– NOS architecture?Client - Server
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© 2001 Information Partners, Inc.
Protocols
Rules, manners formalities andconventions
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© 2001 Information Partners, Inc.
Protocols◆ Definition
A set of rules specifying how a thing isto be done
◆ Layered protocolA protocol in which there is a division of
labor among several agents each ofwhich relies on its subordinate agents
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Protocols
Mrs. Big
Mr. Big
Mr. Big’s Secretary
The mail boy
The mail room clerk
FedEx
Shp/Rcv clerk
Mrs Big
Mr. Big
Mr. Big’s Secretary
The mail boy
The mail room clerk
FedEx
Shp/Rcv clerk
Cleveland London
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© 2001 Information Partners, Inc.
Protocols◆ Ethernet
– Used within a building◆ TCP/IP
– Transmission ControlProtocol/Internet Protocol
– Used for wide area networks– The language of the Internet
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Ethernet◆ It is not possible to determine physical
location from an Ethernet address– PC1 34 56 87 99 01 45– PC2 78 32 44 37 89 61
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TCP/IP◆ It is possible to determine physical
location from a TCP/IP address– PC1 204.96.225.31– PC2 204.96.225.50– Branch 1 204.96.225.x– Branch 2 204.96.224.x
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Address Translation◆ Private IP address ranges were created
when IP was devised.◆ Libraries assign these private IP
addresses to all their devices andtranslate them to real IP addresses onlyfor access outside the library.
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Packets and Frames◆ Two names for the same thing◆ LANs send data in packages or packets◆ Packets have:
– To address– From address– Data– Other stuff
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Ethernet◆ Defines a frame format - IEEE 802.3
◆ Defines how to detect and handlecollisions– CSMA/CD - Carrier Sense Multiple
Access/Collision Detection
Flag Addresses Length Data FCS Flag
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Types of LANs◆ Peer-to-peer
Allows all connected hosts to offerservices to other peers and to takeservices from other peers.
◆ Client - serverSome hosts are clients who only
receive services while other hosts areservers who provide services.
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© 2001 Information Partners, Inc.
Types of LANsPeer-to-peer
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Types of LANsClient - server
Network ServerCD Tower
CD Server
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?
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The Pieces and Parts
Parts is parts
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The Pieces and Parts◆ Clients and servers◆ Wiring◆ Hubs, switches, and routers◆ Patch panels and racks◆ Conduits, ducts and raceways◆ Wall jacks
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The Pieces and Parts
PC
Hub
Wall Jack
PC
Hub
Server
Patch Panel
Patch Panel
Series
RouterInternet
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Clients and servers
Only smart devices need apply– PCs– Minicomputers– Mainframe computers– Printers with network adapters or print
servers
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The Pieces and Parts◆ Wiring
– Coaxial cable– Twisted pair– Fiber optic
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The Pieces and PartsCoaxial cable
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The Pieces and Parts◆ Coaxial cable
– Advantages» Longer distances than TP» Carries voice, data, video» Well known technology
– Disadvantages» Hard to install» More expensive to install» Cable is more expensive than TP
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The Pieces and PartsTwisted pair
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The Pieces and Parts◆ Twisted pair
– Advantages» Inexpensive» Devices easy to connect» Easy to install
– Disadvantages» More prone to noise and interference» Shorter distances than coaxial
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The Pieces and Parts◆ Twisted pair - shielded vs. unshielded◆ UTP grades
– Category 1 - Suitable for voice only– Category 2 - Data at 4Mbps– Category 3 - Data at 10Mbps– Category 4 - Data at 16Mbps– Category 5 - Data at 100+Mbps
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The Pieces and Parts◆ UTP - other decisions
– Plenum vs. non-plenum– Solid vs stranded– Two or four pairs– Costs (per foot)
» Cat 3 2 pair = $ .05» Cat 5 4 pair plenum solid = $ .33» Cat 5 4 pair pvc solid = $ .13» Cat 6 4 pair plenum solid = $ .55
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The Pieces and PartsFiber optic
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The Pieces and Parts◆ Fiber optic
– Advantages» Impervious to interference» Longest cable runs
– Disadvantages» The cables is expensive» Connectors are expensive» Requires the most skill to install
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The Pieces and Parts◆ Wiring designations
– 10Base2 - Thin Ethernet - 185 meters– 10BaseT - UTP - 100 meters– 100BaseT - UTP - 100 meters– 100BaseFX - fiber optic - 2 kilometers
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Structured Wiring◆ Wiring closets
– Usually one per floor– At least 10x5 feet– All devices served must be within 100
wire meters– Conditioned power– Single purpose, i.e., not also the
janitor’s closet
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Vertical Wiring
◆ Connects wiring closets
◆ May be UTP copper but is more likely tobe fiber optic cable
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Horizontal Wiring◆ Connects devices to wiring closet
◆ Usually copper UTP
◆ May run in walls, floor or ceiling
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The Pieces and PartsWiring components
1
2
3
Basement
Horizontal Wiring
Vertical Wiring
Intermediate Hub
Main Hub
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Standards & Certification
◆ All wiring should be done to EIA568/569 standards.
◆ Each individual cable should be testedwith a printed report produced.
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© 2001 Information Partners, Inc.
Documentation◆ Each cable should be numbered on
both ends.◆ A graphic cable plan showing all cable
runs with their numbers should beproduced.
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Clients and servers◆ Wiring◆ Hubs, switches, and routers◆ Patch panels and racks◆ Conduits, ducts and raceways◆ Wall jacks
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Hubs
Connect hosts in a single LAN◆ Switches
– Smart hub◆ Routers
Connect multiple LANs
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© 2001 Information Partners, Inc.
The Pieces and PartsHubs (aka concentrators, repeaters)
NetStackerAsanteAsante
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© 2001 Information Partners, Inc.
The Pieces and PartsRouters
Series
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Clients and servers◆ Wiring◆ Hubs, switches, and routers◆ Patch panels and racks◆ Conduits, ducts and raceways◆ Wall jacks
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© 2001 Information Partners, Inc.
Patch Panel & Rack
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© 2001 Information Partners, Inc.
?
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Clients and servers◆ Wiring◆ Hubs, switches, and routers◆ Patch panels and racks◆ Conduits, ducts and raceways◆ Wall jacks
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© 2001 Information Partners, Inc.
Conduit◆ 1/2 to 1 inch round metal pipe which is
run point-to-point
◆ Although the cheapest, it is the leastflexible
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© 2001 Information Partners, Inc.
Ducts
◆ Flat, rectangular troughs laid in a gridpattern in the floor
◆ Structural steel decking with built inducts
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© 2001 Information Partners, Inc.
Walker Duct
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© 2001 Information Partners, Inc.
Walker Duct
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Walker Duct
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Walker Duct
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© 2001 Information Partners, Inc.
Walker Duct
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Walker DuctLA Studio City Branch
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Walker DuctLA Studio City Branch
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Surface Raceway
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Cable Tray
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© 2001 Information Partners, Inc.
Advice
Never install conduit, ducts, or racewaythat are more than 50% full initially.Make it 40% if you can.
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© 2001 Information Partners, Inc.
Access Flooring
A floor that is raised above the concreteslab. The entire space between theslab and the floor becomes a pathwayfor wiring.
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© 2001 Information Partners, Inc.
Cablefloor
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Cablefloor
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© 2001 Information Partners, Inc.
Cablefloor
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© 2001 Information Partners, Inc.
Cablefloor
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© 2001 Information Partners, Inc.
Cablefloor
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Cablefloor
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Wiring
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© 2001 Information Partners, Inc.
The Pieces and Parts◆ Clients and servers◆ Wiring◆ Hubs, switches, and routers◆ Patch panels and racks◆ Conduits, ducts and raceways◆ Wall jacks
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© 2001 Information Partners, Inc.
Wall Jack
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© 2001 Information Partners, Inc.
Costs◆ Conduit, ducts, access floor◆ Data and electrical cable◆ Labor◆ Outlets
◆ Some costs can be covered by Erate
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© 2001 Information Partners, Inc.
Costs◆ Walker Duct
– 22,000 sq ft with 4 foot grids =$95,000
◆ Cablefloor– $7 - $10 per sq ft installed
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© 2001 Information Partners, Inc.
?
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© 2001 Information Partners, Inc.
Wireless LANs & WANS
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© 2001 Information Partners, Inc.
2.4GHz Digital SpreadSpectrum Radio Frequency
◆ 2.4GHz◆ Digital◆ Spread Spectrum◆ Radio Frequency
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© 2001 Information Partners, Inc.
Wireless LANs
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© 2001 Information Partners, Inc.
Typical WLAN Configuration
Mobile Laptop& Other Computers
Wireless“Cell”
AccessPoint
A C
D E
B
Wired LAN
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© 2001 Information Partners, Inc.
Access Points
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PCMCIA Cards
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Wireless Laptop
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Typical Multi Cell Configuration
Access Point
Wireless Clients
LAN Backbone
Wireless“Cell”
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© 2001 Information Partners, Inc.
Spread Spectrum
Frequency Hopping–MultipathInterferencetolerance
Direct Sequence–Throughput–Range
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© 2001 Information Partners, Inc.
Access Point Coverage2 Mbps FHSS 175 feet radius
2 Mbps DSSS1 Mbps FHSS 350 feet radius
5.5 Mbps DSSS 175 feet radius
11 Mbps DSSS 125 feet radius
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Channels - Direct Sequence
❏ (11) 22 MHz wide stationary channels❏ 11 Mbps data rate without complex modulation scheme❏ 3 non-overlapping channels❏ 3 Access Points can occupy same area
1 2 3 4 5 6 7 8 9 10 112400
2483
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© 2001 Information Partners, Inc.
Frequency Hopping
■ 79 Channels, 1 MHz Each■ Changes frequency (Hops) at least every 0.4 seconds■ Synchronized hopping required
Frequency2.400 GHz 2.483 GHz
Tim
e
12
34
56
78
9
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Freq
uenc
y2.
4 G
Hz
2.48
35 G
Hz
Time
12
3
Freq
uenc
y2.
4 G
Hz
2.48
35 G
Hz
Frequency Hopping Direct Sequence
FH vs. DS: A Summary onInterference Handling
• FH system hops around interference• Lost packets are re-transmitted
on next hop
• Data may be decoded from redundant bits
• Can move to an alternate channelto avoid interference
Channel 1
Channel 3
Channel 2
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© 2001 Information Partners, Inc.
Wireless Friendly◆ Open floor plan◆ No fine grid metal mesh in walls◆ No metallic foil wallpaper◆ Provide for the location of access points
(i.e., power & data) even if you are notready to deploy wireless now
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© 2001 Information Partners, Inc.
Wireless WANs
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Wireless Bridging
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Point-to-Point Configuration
0 to 25 miles(line of sight)
Ethernet
Bridge
OptionalAntenna
Building A Building B
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© 2001 Information Partners, Inc.
Point-to-MultipointConfiguration
Ethernet
Bridge
Building B Building C
Building A
DirectionalAntenna
Omni-directionalAntenna
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© 2001 Information Partners, Inc.
Will a wireless LAN work foryou?
A site survey is the only way to know– Must be done in every case– Use the actual equipment
» Access points» Antennas» PC cards
– Environmental considerations
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© 2001 Information Partners, Inc.
Standards◆ 802.11b
–Adopted in 1997 for FHSS at 1 and2 Mbps and DSSS at 2 Mbps
–Adopted in 1999 for DSSS at11Mbps
◆ 802.11a–Provides for 45Mbps at 5.5GHz
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Costs
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Costs◆ Access points
– $250 - $1000◆ PC cards
– $130 - $250◆ Bridges
– $1500 - $2500
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Use in Libraries◆ Mobility◆ Flexibility◆ High ratio of network connection points
to devices◆ Historical building◆ Construction problems
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© 2001 Information Partners, Inc.
Uses I Know Of◆ Smyrna Public Library◆ William F Laman Public Library◆ Battle Creek Public Schools◆ SMU Law School◆ U of Minnesota Biomedical Library◆ Willard Public Library◆ Franklin County North Carolina◆ Allegany County Maryland
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A Wireless WAN
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What’s Hedy Got To Do WithIt?
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Wireless Goes Mainstream
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Urban Myths
◆ We need fiber to the desktop.◆ We need 100Mbps Ethernet.◆ Wireless is not fast enough.
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Bandwidth & Bottlenecks
Series Series
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Types of Buildings
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Types of Buildings
◆ Central◆ Branch◆ Administrative
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© 2001 Information Partners, Inc.
Central Library◆ Houses your servers◆ Houses your IT staff◆ May be large enough to require wiring
closets
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© 2001 Information Partners, Inc.
Branch Library◆ Also applies to a central library where
computer services are delivered by aconsortium
◆ Has at least a telecommunications room◆ May house print, file and/or
management servers.
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© 2001 Information Partners, Inc.
Administrative Building◆ No public computers◆ Typically houses administration and
technical services◆ May house servers◆ More like a commercial office building
than a library
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© 2001 Information Partners, Inc.
Technology Infrastructure andSupport
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© 2001 Information Partners, Inc.
Computer Room◆ Houses servers and
telecommunications equipment◆ Your principal computer room should be
at least 10x20 feet◆ Centrally located is better◆ Requires conditioned power◆ May require separate HVAC◆ Does not house people
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© 2001 Information Partners, Inc.
Computer Room
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© 2001 Information Partners, Inc.
Telecommunications Room◆ Houses telecommunications equipment
for a branch and may house servers◆ Should be at least 10x10 feet◆ Entry point for telco service◆ Centrally located is better◆ Requires conditioned power◆ May require separate HVAC◆ Does not house people
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© 2001 Information Partners, Inc.
Wiring Closet
We’ve already talked about this.
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© 2001 Information Partners, Inc.
Wiring Closet
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© 2001 Information Partners, Inc.
Furniture◆ Furniture should be a part of your
structured wiring.◆ Use furniture with built in cable
management.
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© 2001 Information Partners, Inc.
Cable Management - NOT
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© 2001 Information Partners, Inc.
Cable Management
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© 2001 Information Partners, Inc.
Cable Management
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© 2001 Information Partners, Inc.
Technology Devices Need◆ Space◆ Data◆ Electrical power◆ Cooling (aka HVAC)
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© 2001 Information Partners, Inc.
Electrical Power◆ All servers and telecommunications
equipment should be providedconditioned power on circuits notshared with other types of equipment.
◆ All PCs should be on circuits not sharedwith other types of equipment.
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© 2001 Information Partners, Inc.
Grounding◆ Common
– Shared among all circuits◆ Isolated
– Dedicated to each circuit◆ Driven earth
– Ground connected to a copper roddriven into the ground
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© 2001 Information Partners, Inc.
Technology Devices Need◆ Space◆ Data◆ Electrical power◆ Cooling (aka HVAC)
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© 2001 Information Partners, Inc.
HVAC◆ Although most computers used in
libraries today say they will operate inan “office environment”, that does notmean an enclosed closet. Additionalcooling may be required.
◆ Both a PC and a laser printer produceas many BTUs as a person.
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© 2001 Information Partners, Inc.
Telephones◆ Use Cat5 UTP for telephones.◆ Voice over IP allows voice and data to
flow over the same network.◆ The current trend is to merge voice,
video and data into one network.
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© 2001 Information Partners, Inc.
Tradition Phone Systems
PBX
Telephone Central Office
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© 2001 Information Partners, Inc.
Traditional Phone Systems
Main Library
Telco CO
Branch 1 Branch 2
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© 2001 Information Partners, Inc.
VOIP Using Standard Phones
PBX
Telephone Central Office
Router
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© 2001 Information Partners, Inc.
VOIP Using IP Phones
PBX
Telephone Central Office
Router
Hub
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© 2001 Information Partners, Inc.
Voice Over IP
Main Library
Telco CO
Branch 1 Branch 2