CDMA + Code Dialing Overview

1. CDMA + Code Dialing Overview Presented by QUALCOMM, December 13, 2004 Contributions from KDDI and Telecom New Zealand

2. Agenda • What • Why • How • When • Future

3. CDMA + Code Dialing – What? • + code dialing allows a subscribers to easily place an international call without having to memorize each International Direct Dial (IDD) access code per visited country • + code dialing does not provide the country code, city code, choice of long distance carrier (e.g. in Brazil) or any other ‘codes’

4. CDMA + Code Dialing – Why? • Many subscribers do not know what an international access code is. • It is not convenient for subscribers to carry a piece of paper that lists the international access codes • Customers require simplicity in roaming service, particularly when utilizing roaming service outside their home country • Carriers cannot generate roaming revenue if customers cannot figure out how to place international calls

5. CDMA + Code Dialing – Why? • Based on this carrier feedback, the CDG International Roaming Team passed a resolution agreeing to pursue + code dialing for CDMA carriers. • The resolution can be viewed on the CDG website at http://www.cdg.org/cdg/CDGExecOffice/files/2003.1_Plus_Code_Board_Resolution_CDG.pdf

6. CDG Resolution • The CDG Executive Board and supporting carrier members unanimously agree on the need and desire to implement “+ code” dialing in all IS-95 and IS-2000 based CDMA networks and terminal devices. We further support the uniform implementation of this capability by a cutoff date of 1 July 2004. • “+ Code” dialing is the capability for a mobile subscriber to access the International Direct Dial (IDD) Code in any market by inputting the “+” symbol with the dialed number. This benefits that this capability offers to the subscriber extends beyond IDD code access. Subscribers enjoy the convenience of easy storing and recall of numbers in address books as well as simplified use of Short Message Services (SMS). • The “+ code” is ubiquitous to GSM services today and GSM subscribers are accustomed to its use. As CDMA2000 expands globally and as CDMA2000 networks attract a greater number of former GSM users, it is important that capabilities such as “+ code” are available on CDMA2000 networks and terminal devices. • The CDG Board recognizes that implementation of this capability will require software modifications by infrastructure and terminal vendors and hardware modifications by terminal vendors. All parties must also work together to test the capabilities prior to commercial service. The Board further encourages active discussion with the vendor community to discuss how the required modifications can be made with minimum complexity and in the time-frame stated above. • While the implementation of “+ code” dialing may not bring direct revenue benefits to the CDMA carriers or vendors, it is a critical capability which will increase customer satisfaction and the competitiveness of CDMA networks in the global market place.

7. 2003 CDMA + Code CDG Board Resolution This Executive Board resolution is supported by the following members: • ALLTEL • Bell Mobility • BellSouth International • China Unicom • KDDI • LG Telecom • Nextel Communications • Qwest • SK Telecom • Sprint • Telecom New Zealand • Telstra Mobile • Telus Mobility • US Cellular • Verizon Wireless This Resolution is further endorsed by the following carriers: • APBW • Hutchison CAT • Hutchison Hong Kong • Guamcell

8. CDMA + Code Dialing - How? There are two basic ways to implement CDMA + code dialing • Network based solution (when implemented consistently) • Long term • Short term • Option 1 • Option 2 • Handset based solution – (prior to consistent implementation)

9. CDMA + Code Dialing - How? There are two basic ways to implement CDMA + code dialing • Network based solution a. Long term • Step 1: change to serving carrier MSCs • Ericsson MSC V5.1.1; HLR V5.1 Available now • Lucent R24.0 Available 1H05 • Nortel MTX14 Available 3Q06 • Motorola Still working to confirm • Samsung Still working to confirm • Step 2: change to terminals • CDG IRT determined the long term network based solution to be the preferred option in 2003

10. CDMA + Code Dialing - How? • Network based solution b. Short term • Option 1 – Originating MSC sends Initial Address Message(IAM) to International PSTN • Option 2 – Originating MSC sends FEATREQ to STP • Of the carriers that responded with a preference, the majority of carriers supported Option 1 • KDDI has provided several contributions on this topic. The most recent can be found at http://www.cdg.org/members_only/teams/IntRoaming/docs/040617/20040617-3-%2BCodeDialing-KDDI.ppt

11. CDMA + Code Dialing - How? There are two basic ways to implement CDMA + code dialing • Network based solution • Handset based solution • Requires the use of a lookup table in the handset • This option will be discussed by QUALCOMM China

12. Future Network Solution Long Term • Carriers to work with MSC vendors to ensure their MSCs can utilize CDMA + code dialing • Carriers to work with terminal vendors to ensure they show the + key and can support the network solution • Share status and plans with roaming partners Short term solutions • Carriers to provide status on implementation of KDDI proposal for *xy solution • Consider proposals for handset based solution Status • Years of discussion but small steps forward

13. Appendix Additional reference documents on + code dialing Recent KDDI presentations on short term solutions

14. Additional Resource Documents on CDG website • http://www.cdg.org/members_only/teams/IntRoaming/docs/040310/20040310-1-%2BCode%20Numbering-KDDI.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/040617/20040617-19-%20AccessChannelImpactofPlusCode-LucentNZ.doc • http://www.cdg.org/members_only/teams/IntRoaming/docs/030306/1_Plus_code_dialing_Ericsson.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/030306/1_%20A.I%20for%20Plus%20Code%20Dialing_KDDI.doc • http://www.cdg.org/members_only/teams/IntRoaming/docs/031215/20031215-1B-Interim%2BCode-VeriSign.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/030924/20030924-1A-%2Bcode-KDDI.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/030626/1_PlusFeatureCode(Qualcomm).pdf • http://www.cdg.org/members_only/teams/IntRoaming/docs/030306/1_CDG_dialing_KDDI.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/030306/1_Comments%20on%20Plus%20Code%20User%20Interaction%20Draft%2011_SLB.doc • http://www.cdg.org/members_only/teams/IntRoaming/docs/121602/kddi_asterisk_code_dialing.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/121602/plus_code_dialing_cdg.ppt • http://www.cdg.org/members_only/teams/IntRoaming/docs/082102/plus_code_cdg_020821_qualcomm.ppt

15. Proposed prefix number of + Code Dialing CDG International Roaming Team Miami in June 2004 KDDI Corporation

16. Signaling Network HLR HLR MSC/VLR MSC/VLR Serving Network Home Network Case 1 Homer Roamer Case 2 PSTN Roamer Network Boundary MS MS MS Proposed prefix number of + Code Dialing KDDI proposes “*99” to initiate + Code Dialing as a default (not mandatory) value. * Home Operator can choice any other prefix number for + Code Dialing.But it will need some negotiations with the Serving Carriers. Case 1 Roamer dials *99+CC+MDN. (e.g. *99-81-80-5066-9360) Case 2 Roamer dials *99+CC+PSTN Number. (e.g. *99-81-3-6678-4558)

17. MS MSC Dial digits + SEND(*99-CC-3-6678-4558) 1 2 3 Convert dial digits ex.) *99-CC-3-6678-4558 IAC-CC-3-6678-4558 call setup (IAC-CC-3-6678-4558) + Code Dialing Option 1 1. The user dials *99-CC-3-6678-4558. 2. Originating MSC translates to IAC-CC-3-6678-4558. 3. Originating MSC sends IAM to International PSTN.

18. Requirements of Option 1 • Home Operator • No impact. • STP Provider • No impact • Serving Carriers • To provide “+ Code Dialing Option 1”.

19. MS MSC STP Provider feature code string + SEND(*99-CC-3-6678-4558) 1 2 3 4 FEATREQ[DGTSDIAL(*99-CC-3-6678-4558)] featreq [FEATRESULT, TERMLIST(PSTNTermination (DestinationDigits (IAC-CC-3-6678-4558) ) ), ANNLIST] call setup + Code Dialing Option 2 1. The user dials *99-CC-3-6678-4558. 2. Originating MSC sends a FEATREQ to STP Provider. STP Provider recognizes to initiate + Code Dialing procedure because DGTSDIAL starts from *99. 3. STP Provider translates to IAC-CC-3-6678-4558. STP Provider sends a featreq with FEATRESULT that is successful and TERMLIST that is PSTNTermination (IAC-CC-3-6678-4558). 4. Originating MSC sends IAM to International PSTN.

20. Requirements of Option 2 • Home Operator • No impact. • STP Provider • To provide “+ Code Dialing Option 2”. • Serving Carriers • To send FEATREQ. • To send IAM when it receive FEATREQ RR.