1. 1 LG Information & Communications, Ltd. LGIC 2000 LGIC Proprietary & confidential / All Right Reserved BTS BSC/ PCF PDSN Internet/ Intranet VFS TG SG PSTN/ PLMN BTS BSC/ PCF MCA (MM/CCA/PRC) ICG HLR 3G All IP Network Logical Peer to Peer Connection - Phase I Legacy MSC

2. 2 LG Information & Communications, Ltd. LGIC 2000 LGIC Proprietary & confidential / All Right Reserved IP network BTS BSC/ PCF BSC/ PCF PDSN Internet/ Intranet MCA (MM/CCA/PRC) TG SG PSTN/PLMN ICG HLR 3G All IP Network VFS BS/PCF MSC GW HLR Aquater 3G-legacy network Physical Connection - Phase I

3. 3 LG Information & Communications, Ltd. LGIC 2000 LGIC Proprietary & confidential / All Right Reserved PDSN Internet IP network BTS BSC/ PCF BSC/ PCF MCA (MM/CCA/PRC) TG SG ICG HLR VFS AAA/HA Gate Keeper Gateway End IP Host 1 PSTN Mobile H.323 terminal or SIP client H.323 terminal or SIP client SIP server End IP Host 2 H.323 terminal or SIP client 3G-All IP End to End VoIP Service over Phase I Network

4. 4 LG Information & Communications, Ltd. LGIC 2000 LGIC Proprietary & confidential / All Right Reserved BTS PDSN Internet/ Intranet VFS TG SG PSTN/ PLMN BTS SDU MCA (MM/CCA/PRC) ICG HLR 3G All IP Network RRC PCF SDU RRC PCF Logical Peer to Peer Connection - Phase II

5. 5 LG Information & Communications, Ltd. LGIC 2000 LGIC Proprietary & confidential / All Right Reserved IP network BTS SDU RRC PDSN Internet/ Intranet MCA (MM/CCA/PRC) TG SG PSTN/PLMN ICG HLR 3G All IP Network VFS PCF BS/PCF MSC GW HLR Aquater 3G-legacy network Physical Connection - Phase II