1. LZY 213 1023 R1 -2 Page 1 of 15 D-AMPS Wireless Office Services

2. LZY 213 1023 R1 -2 Page 2 of 15 D-AMPS Wireless Office Services D-AMPS Wireless Office System Cellular Radio Exchange Mobility Server Radio Head

3. LZY 213 1023 R1 -2 Page 3 of 15 D-AMPS Wireless Office Services Digital Wireless Office Concept... Extend the value of the Cellular Macro network into the enterprise –Ericsson DWOS and operator partner to provide incremental added value for enterprise customers RF Coverage/Capacity Abbreviated Dialing Call Delivery Flat Rate Pricing Single Phone Concept IS-136/TDMA Evolution (Open Standard) Virtual Single Cell Architecture (vs Microcellular)

4. LZY 213 1023 R1 -2 Page 4 of 15 D-AMPS Wireless Office Services Virtual Single Cell Advantages Efficient use of RF-Spectrum –All frequencies available to any base station –Multicasted Digital Control Channel Low interference –Automatic Frequency Allocation –Dynamic Channel Selection of lowest interfered channel –Mobile Power Control based on interference Installation and support –Minimal cell planning required –Category 5 cable

5. LZY 213 1023 R1 -2 Page 5 of 15 D-AMPS Wireless Office Services Today’s Business Challenges... As companies continue to “rightsize”, employees must do more with less Average hours an employee works per week increased from 44 to 51 Quality customer service / responsiveness is no longer a competitive advantage, but a competitive necessity Time to market / first to market timelines continually become shorter Employee satisfaction is moving up the priority list

6. LZY 213 1023 R1 -2 Page 6 of 15 D-AMPS Wireless Office Services Source: Wall Street Journal, Yankee Group Ericsson Proprietary Today’s Workplace Challenges... 7 out of 10 calls fail to reach the person called 1.5 hours a day spent in voicemail (302 hr./year) average employee spends almost 40% of time away from desk at least 2/3 of the time is spent within the same building or campus

7. LZY 213 1023 R1 -2 Page 7 of 15 D-AMPS Wireless Office Services Who Benefits from Wireless Office? Wireless Operators Enterprises End Users

8. LZY 213 1023 R1 -2 Page 8 of 15 D-AMPS Wireless Office Services Wireless Office Benefits the Operator... The service provides a sizeable and positive NPV via increased airtime, monthly fees, etc. Customer retention tool –Churn reduced to 0%!! Attract new business users –Reduced cost to acquire a customer (group sign up) Positive churn (users from other operators) Perceived as market/technology leader –Competitive advantage via service differentiation –Differentiation against other wireless technologies

9. LZY 213 1023 R1 -2 Page 9 of 15 D-AMPS Wireless Office Services Increased productivity Cost savings –Reduced costs for moves, adds and changes –Reduction in call back costs –Reduced equipment cost –More control over mobile phone usage Wireless Office Benefits the Enterprise...

10. LZY 213 1023 R1 -2 Page 10 of 15 D-AMPS Wireless Office Services Improved availability –Faster and more accurate decisions can be made –Positive impact on sales revenues Improved customer satisfaction Wireless Office Benefits the Enterprise...

11. LZY 213 1023 R1 -2 Page 11 of 15 D-AMPS Wireless Office Services One phone One office number Increased accessibility and mobility Increased business opportunities Wireless Office Benefits End Users...

12. LZY 213 1023 R1 -2 Page 12 of 15 D-AMPS Wireless Office Services Manufacturing operations General business Hospitals Utilities Professional firms –legal/consulting/financial Conference centers/resorts Wireless Office Key Market Segments

13. LZY 213 1023 R1 -2 Page 13 of 15 D-AMPS Wireless Office Services System Architecture

14. LZY 213 1023 R1 -2 Page 14 of 15 D-AMPS Wireless Office Services PBX Support Cellular Radio Exchange Radio Heads Mobility Server PSTN PBX The following PBXs will be tested on our lab – Ericsson – Lucent – Nortel Trunk interface to PBX –AT&T ISDN PRI –No need to allocate a PBX extension for each Wireless Office user User configurations –PBX only –Wireless Office only –Both PBX and Wireless Office System System is prepared for Central Office trunks ISDN PRI

15. LZY 213 1023 R1 -2 Page 15 of 15 D-AMPS Wireless Office Services End User Features/PBX Services Concurrent ringing Calling line/party ID presentation and restriction Inquiry, refer back and call transfer Call back when free Personal number –Call forwarding –Call screening Cellular call screening Abbreviated dialing Call discrimination Call waiting Personal assistant –DTMF and web administration Wireless Office System Voice Mail PBX Voice Mail Message Waiting Indicator Authentication

16. LZY 213 1023 R1 -2 Page 16 of 15 D-AMPS Wireless Office Services Radio Network Requirements High Radio Network Quality No interference to external systems Automatic Radio Network Control

17. LZY 213 1023 R1 -2 Page 17 of 15 D-AMPS Wireless Office Services System Capacity Coverage controlled by number and placement of radio heads – Maximum 32 radio heads per system Call handling capacity controlled in Cellular Radio Exchange – Up to eight SPUs – 45 Erlang @ 0.5% Blocking 900 users @ 50 mE/user 450 Users @ 100 mE/user 225 Users @ 200 mE/user 10,000 users can be defined in the system

18. LZY 213 1023 R1 -2 Page 18 of 15 D-AMPS Wireless Office Services Operation & Maintenance Minimal cell planning – Automated radio network control – Digital control channel multi-casted – Yields for outdoor system – Blocking of selected frequencies possible Management through Web browser and TCP/IP connection – Access rights defined by user category Hot swapping for capacity expansion

19. LZY 213 1023 R1 -2 Page 19 of 15 D-AMPS Wireless Office Services Summary Private network node –MSC and VLR functionality –IS-41 link to HLR Virtual single cell radio infrastructure –High capacity –High voice quality –Minimal cell planning Flexible architecture –Independent capacity and coverage expansion possible Easy installation and support –Standard twisted pair cables –Web browser based O&M application –Plug and play Wide range of PBX features