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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 £ |
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Switches, including cabinets, etc | 167 | 4,461 | 744,987 | 25 | 5,461 | 136,525 |
| Cabling, including frames | 4,000 | 180 | 720,000 | 430 | 250 | 107,500 |
| Wired network card/adaptor | 2,500 | 28 | 70,000 | Ìý | Ìý | Ìý |
| Wireless network card/adaptor | Ìý | Ìý | Ìý | 2,500 | 45 | 112,500 |
| Wireless access points | Ìý | Ìý | Ìý | 250 | 540 | 135,000 |
| Power over ethernet adaptors | Ìý | Ìý | Ìý | 40 | 35 | 1,400 |
| Wireless network management software | Ìý | Ìý | Ìý | 1 | 50,000 | 50,000 |
| Total cost | Subtotal A | 1,534,987 | Subtotal B | 542,925 | ||
| Ìý | ||||||
| Total saving of installing a wireless network in lieu of a wired network = subtotal A minus subtotal B: | 992,062 | |||||
| Ìý | Cost per user : | 614 | 217 | |||
| (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) | 500 | 140 | 70,000 |
| Gateways | 2 | 3,000 | 6,000 |
| Switches | 9 | 2780 | 25,020 |
| Server (including software) | 2 | 9,000 | 18,000 |
| Subtotal A | 119,020 | ||
| Ìý | |||
| Operational expenditure, excluding calls | Years | Unit £/yr | Total £ |
| Maintenance (Gateway) | 5 | 1,500 | 7,500 |
| Average office departmental re-organisation | 5 | – | – |
| 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 | |||
| Ìý | Qty | Unit £ | Total £ |
| Digital phone/handsets (medium spec) | 500 | 180 | 90,000 |
| PBX | 2 | 30,000 | 60,000 |
| Voice backbone | 500 | 65 | 32,500 |
| Subtotal D | 182,500 | ||
| Ìý | |||
| Ìý | Years | Unit £ | Total £ |
| Maintenance | 5 | 20,000 | 100,000 |
| Average office departmental re-organisation | 5 | 12,375 | 61,875 |
| 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) | 2 | 2,350 |
| Broadcast Tech 3000 Chassis | 1 | 4,150 |
| DVB T 8 mHz single input dual ASI out (Freeview decoder) | 4 | 1,180 |
| iPlex Chassis, documentation, sub-module, sub-carrier and OS | 2 | 12,000 |
| 2-Port ASI Input (Rx) I/O Module | 3 | 1,550 |
| Iplex media encoder with AC 3 Option (MPEG2 encoder) | 10 | 2,500 |
| Iplex sub carrier module | 2 | 450 |
| Iplex copper transceiver | 2 | 180 |
| Amino 110 (set-top box) | 500 | 180 |
| Management software Windows XP | 1 | 15,000 |
| Linux server for EPG/DHCP | 2 | 1,500 |
| Power over ethernet injectors/adaptors | 500 | 30 |
| Rack-mounted 15 in LCD screen with mouse and keyboard | 1 | 1,500 |
| Client training | 1 | 3,000 |
| Total costs | 195,980 | |
| 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 | |||
| Ìý | Ìý | Ìý | Ìý |
| Server configuration | Qty | Unit £ | Total £ |
| Tower server (four processors) | 6 | 10,400 | 166,400 |
| Rack optimised server (four processors) | 16 | 9,000 | 144,000 |
| Blade server (four processors) | 6 | 8,000 | 128,000 |
| ClearCube (two processors) | 32 | 3,250 | 104,000 |
| Costs comparison of magnetic and optical media | ||
| Ìý | ||
| Ìý | Capacity | cost |
| Magnetic media | Gb | £ |
| Internal tape drive | 160-440 | 25-55 |
| Hard disc SATA | 75-480 | 30-240 |
| Hard disc SCSI | 50-300 | 135-485 |
| Optical media | Ìý | Ìý |
| Compact disc | 0.7-0.8 | 0.33-0.60 |
| DVD (single recordable) | 4.7-8.5 | 0.33-3.13 |
| Cost and energy usage comparisons of computer screen technologies | |||||||||
| Ìý | |||||||||
| Size | CRT | LCD | Plasma | CRT | LCD | Plasma | CRT | LCD | Plasma |
| Ìý | Res | Res | Res | Watts | Watts | Watts | £ | £ | £ |
| 17 in standard | 1,024 × 768 | 1,280 × 1,024 | Ìý | 90 | 33 | Ìý | 85 | 160 | Ìý |
| 19 in standard | 1,600 × 1,200 | 1,280 × 1,024 | Ìý | 130 | 50 | Ìý | 100 | 265 | Ìý |
| 21 in standard | 1,800 × 1,440 | 1,600 × 1,200 | Ìý | 170 | 58 | Ìý | 310 | 470 | Ìý |
| 23 in widescreen | Ìý | 1,920 × 1,200 | Ìý | Ìý | 80 | Ìý | Ìý | 980 | Ìý |
| 32 in widescreen | Ìý | 1,280 × 764 | Ìý | Ìý | 150 | Ìý | Ìý | 1,235 | Ìý |
| 37 in widescreen | Ìý | 1,280 × 768 | 852 × 480 | Ìý | 230 | 400 | Ìý | 2,025 | 860 |
| 42 in widescreen | Ìý | Ìý | 1,024 × 768 | Ìý | Ìý | 450 | Ìý | Ìý | 1,795 |
| 45 in widescreen | Ìý | Ìý | 1,920 × 1,080 | Ìý | Ìý | 292 | Ìý | Ìý | 3,800 |
| (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 | 100 | 28,214 | 2,821,400 |
| Thin client environment | 100 | 19,000 | 1,900,000 |
| Total saving using thin client | Ìý | 9,214 | 921,400 |
| (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 | 350 | 2,000 |
| Laptop or notebook | 450 | 3,500 |
| PDA | 150 | 800 |
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