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Cost comparison of wireless network using Wi-Fi technology and conventional wired network
Ìý Wired network Wireless network (Wi-Fi)
Component Qty Unit £ Total £ Qty Unit £ Total £
ÌýÌýÌýÌýÌýÌýÌý
Switches, including cabinets, etc 1674,461744,987255,461136,525
Cabling, including frames 4,000180720,000430250107,500
Wired network card/adaptor 2,5002870,000ÌýÌýÌý
Wireless network card/adaptor ÌýÌýÌý2,50045112,500
Wireless access points ÌýÌýÌý250540135,000
Power over ethernet adaptors ÌýÌýÌý40351,400
Wireless network management software ÌýÌýÌý150,00050,000
Total costSubtotal A1,534,987Subtotal B542,925
Ìý
Total saving of installing a wireless network in lieu of a wired network = subtotal A minus subtotal B: 992,062
ÌýCost per user : 614217
(As applied to a new 12 storey office building with 2500 users)
Typical VoIP lifecycle cost comparison over five-year period
VoIP (IP PBX)
Capital expenditure Qty Unit £ Total £
Internet Protocol (IP) Handsets (medium spec) 50014070,000
Gateways 23,0006,000
Switches 9278025,020
Server (including software) 29,00018,000
Subtotal A 119,020
Ìý
Operational expenditure, excluding calls Years Unit £/yr Total £
Maintenance (Gateway) 51,5007,500
Average office departmental re-organisation5– –
Subtotal B 7,500
Total typical cost for VoIP, subtotal C (subtotal A + B) 126,520
Cost per user (subtotal C/500) 253
Ìý
Traditional system
ÌýQty Unit £ Total £
Digital phone/handsets (medium spec) 50018090,000
PBX 230,00060,000
Voice backbone 5006532,500
Subtotal D 182,500
Ìý
ÌýYears Unit £ Total £
Maintenance 520,000100,000
Average office departmental re-organisation512,37561,875
Subtotal E 161,875
Total typical cost for VoIP, subtotal F (subtotal D + E)344,375
Cost per user (subtotal F/500) 689
Ìý
Total savings using IP PBX (Sub F-C) = 217,855 (Based on new office building in London, with 500 handsets and users and a conventional LAN)
Cost comparison of copper and fibre cabling
Cable type Floor grid Average run £/´Ç³Ü³Ù±ô±ð³Ù
Category 6 (copper) 2.4 m 60 m 65-95
Four-core duplex (50/125 micron) multimode (fibre) 2.4 m 60 m 150-200
(Costs are based on using a typical tree topology arrangement with a fibre backbone and either copper or fibre cable to the desk. Patcyh panels and floor boxes are included but active equipment excluded)
Cost of installing an IPTV system of 500 screens within a commercial stadium
Ìý
Description Quantity Unit £
Tandberg TT1220 IRD (BSkyB decoder) 22,350
Broadcast Tech 3000 Chassis 14,150
DVB T 8 mHz single input dual ASI out (Freeview decoder) 41,180
iPlex Chassis, documentation, sub-module, sub-carrier and OS 212,000
2-Port ASI Input (Rx) I/O Module 31,550
Iplex media encoder with AC 3 Option (MPEG2 encoder) 102,500
Iplex sub carrier module 2450
Iplex copper transceiver 2180
Amino 110 (set-top box) 500180
Management software Windows XP 115,000
Linux server for EPG/DHCP 21,500
Power over ethernet injectors/adaptors 50030
Rack-mounted 15 in LCD screen with mouse and keyboard 11,500
Client training 13,000
Total costs195,980
Total cost per set-top box and screen 392
(The cost of screens, their installation, cabling and off-air channels have been excluded)
Costs of server types
ÌýÌýÌýÌý
Server configuration Qty Unit £Total £
Tower server (four processors) 610,400166,400
Rack optimised server (four processors) 169,000144,000
Blade server (four processors) 68,000128,000
ClearCube (two processors) 323,250104,000
Costs comparison of magnetic and optical media
Ìý
ÌýCapacitycost
Magnetic mediaGb£
Internal tape drive 160-440 25-55
Hard disc SATA75-48030-240
Hard disc SCSI 50-300135-485
Optical mediaÌýÌý
Compact disc0.7-0.80.33-0.60
DVD (single recordable)4.7-8.50.33-3.13
Cost and energy usage comparisons of computer screen technologies
Ìý
Size CRT LCDPlasma CRTLCD Plasma CRT LCDPlasma
ÌýResResResWattsWattsWatts£££
17 in standard 1,024 × 768 1,280 × 1,024 Ìý9033Ìý85160Ìý
19 in standard 1,600 × 1,200 1,280 × 1,024 Ìý13050Ìý100265Ìý
21 in standard 1,800 × 1,440 1,600 × 1,200 Ìý17058Ìý310470Ìý
23 in widescreen Ìý 1,920 × 1,200 ÌýÌý80ÌýÌý980Ìý
32 in widescreen Ìý1,280 × 764 ÌýÌý150ÌýÌý1,235Ìý
37 in widescreen Ìý1,280 × 768 852 × 480 Ìý230400Ìý2,025860
42 in widescreen ÌýÌý1,024 × 768 ÌýÌý450ÌýÌý1,795
45 in widescreen ÌýÌý1,920 × 1,080 ÌýÌý292ÌýÌý3,800
(The table includes power consumption and picture resolution, but costs exclude installation.
Res = 640 pixels wide × 480 pixels high (480 lines of resolution)
Watts = Amount of electrical energy used within one hour
Comparative costs of standard workstations and thin clients
Ìý
Description Qty Unit £ Total £
Standard workstation environment 10028,2142,821,400
Thin client environment 10019,0001,900,000
Total saving using thin client Ìý9,214921,400
(The table shows the total cost of ownership over five years, assuming the workstation base cost excluding monitor is £650)
Comparative costs of desktop technology
Ìý
Device Approx. Lowest £ Approx. Highest £
Desktop or workstation 3502,000
Laptop or notebook 4503,500
PDA 150800