CDMA + Code Dialing Options

CDMA + Code Dialing Options CDMA 450 Roaming Conference London, England Presented by Libby Mackay, March 2005 With contributions from: KDDI, Telecom New Zealand and Ericsson 1

Agenda What is plus code dialing Why utilize plus code dialing Solutions Network based solutions Handset based solution Appendix Additional documentation CDG Resolution 2

CDMA Plus Code Dialing What is it? Plus code dialing allows a subscriber to easily place an international call without having to memorize each International Access Code (IAC) per visited country The subscriber simply pushes a key on their handset and the IAC is dialed for them Plus code dialing does not provide the country code, city code, choice of long distance carrier or any other codes 3

CDMA + Code Dialing Why do it? Ease of use - Many subscribers do not know what an international access code is + Practicality - It is not convenient for subscribers to carry a piece of paper that lists the international access codes + Simplicity - Customers require simplicity in roaming service, particularly when utilizing roaming service outside their home country when things can get quite complex = Revenue - Carriers cannot generate roaming revenue if customers cannot figure out how to place international calls 4

CDMA + Code Dialing Why? Based on this carrier feedback, the CDG International Roaming Team passed a resolution agreeing to pursue plus code dialing for CDMA carriers. For CDG members, the resolution can be viewed on the CDG website at http://www.cdg.org/cdg/cdgexecoffice/files/2003.1_plus_code_b oard_resolution_cdg.pdf 5

CDMA + Code Dialing - Solutions There are a variety of ways to implement CDMA plus code dialing 1. Network standards based solution (best solution when implemented consistently by all or most CDMA carriers) a. Long term solution - Standards based solution exists* b. Short term solution - *XY solution 2. Handset based solution (useful prior to consistent network based implementation) *In 2003 the CDMA Development Group (CDG) International Roaming Team (IRT) determined the long term network based solution to be the preferred option. 6

CDMA + Code Dialing Network based solutions Long term The standards for this solution are specified in TIA/EIA/IS- 875 and TIA/EIA/IS-2000.5-C Plus code dialling relieves the user of the need to dial an international access prefix, which may vary between countries and carriers. This capability allows telephony addresses to be entered, received, displayed, stored and transmitted in an international format (full ITU-T E.164 number, including country code). When addresses are entered by a user, the MS user interface can provide an input aid, such as a key marked with a + sign, to indicate that the address is international. When displayed by the MS, they can be identified by a visual device, such as a + prefix. When received, transmitted, or stored, an international indicator can be included with the address digits. It will be the responsibility of the network to ignore the international indicator when attached to a national number. This allows users to store and dial all phone numbers in a consistent format, which is particularly useful for international travellers. 7

CDMA + Code Dialing Network based solutions Long term network standards based solution implementation requirements Step 1: Requires a software update to serving carrier Mobile Service Switching Center (MSC) Status below for some MSC vendors: Ericsson MSC V5.1.1; HLR V5.1 Update available now Lucent R24.0 Update tentatively available 1H05 Nortel MTX14 Update tentatively available 3Q06 Motorola Still working to confirm availability Samsung Still working to confirm availability You must work with your infrastructure vendor to determine feature availability for your network 8

CDMA + Code Dialing Network based solutions Step 2: Mobile Station requirements Requires a change to terminals to add the plus to the key pad Requires the ability to display and store the + symbol Ability to originate an international call Step 3: Billing MSC must be able to represent a plus code origination in an acceptable format in a CDR Billing system must be able to process altered CDR format 9

CDMA + Code Dialing Network based solutions Short term network based solution *XY Roaming subscriber enters *99 in place of the IAC and originating MSC translates *99 to the correct IAC *XY = *99 is being suggested but is not mandatory Originating MSC sends Initial Address Message (IAM) to International PSTN This is the preferred short term solution by carriers who responded to the CDG survey with a preference 10

Short term network based solution (*XY) MS MSC Dial digits + SEND (*99-CC-3-6678-4558) 1 Convert dial digits ex.) *99-CC-3-6678-4558 IAC-CC-3-6678- 4558 call setup ( IAC-CC-3-6678-4558) 2 3 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. CC = Country Code; IAC = International Access Code; IAM = Initial Address Message 11

Short term network based solution (*XY) CDG/IRT proposes *99 to initiate + Code Dialing as a default value. HL R Signaling Network HL R MSC/VLR Home Network MSC/VLR Serving Network Case 1 Roamer dials *99+County Code (CC)+ Mobile Dialable Number (MDN). (e.g. *99-81-80-5066-9360) MS Homer Case 1 MS Roamer Case 2 Roamer dials *99+CC+PSTN Number. (e.g. *99-81-3-6678-4558) PSTN Case 2 MS Network Boundary Roamer *KDDI has provided several contributions on this topic, including this slide. The most recent contribution can be found at http://www.cdg.org/members_only/teams/introaming/docs/040617/20040617-3-%2bcodedialing-kddi.ppt 12

CDMA + Code Dialing Network based solutions *XY Implementation requirements Home Operator Change translations to allow *XY for their own customers who might happen to dial this prefix on their home network Check with billing vendor to ensure *XY calls rate properly MSC Provider No impact Serving Carriers To provide *XY plus code dialing by changing translations in their switch to recognize the dialed digits and translate to the IAC 13

CDMA + Code Dialing Handset based solution Handset based solution Requires the use of a lookup table in the handset Does not rely on other carriers to implement any plus code dialing solution This option has been discussed at CDG IRT meetings and is under consideration Additional documents can be found on the CDG website 14

Appendix Additional reference documents on plus code dialing http://www.cdg.org/members_only/teams/introaming/document_archi ve.asp CDG IRT Plus code dialing resolution 15

CDG Resolution The CDG Executive Board and supporting carrier members unanimously agreed 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. 16

CDG Resolution 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. 17

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 18

THANK YOU CDMA 450 Roaming Conference London, England Presented by Libby Mackay, March 2005 lmackay@qualcomm.com + 1 858 651-0836 desk + 1 816 210-1184 - PCS 19