1. Ikhlaq Sidhu, Ph.D. Vice President, S4 Division Personal Connectivity Business Unit March 1999 ® SIP Update VON Europe 99

2. Advanced Technologies, 3Com ® SS7 5E IP NETWORK 4E CO Enterprise LAN Cable Modem xDSL LEC Bypass MTA or Ethernet phone GWGW ;Smart clients (not trusted) ;Billing / fraudulent usage ;CLASS features ;Privacy ;QOS

3. Advanced Technologies, 3Com ® SS7 5E IP NETWORK 4E CO GWGW Trunk Based Toll Switch Bypass GWGW ;Transparent long distance ;Single stage dialing ;SS7 Inter-working ;Core network convergence

4. Advanced Technologies, 3Com ® SS7 5E IP NETWORK 4E CO ITGITG MTA or Etherphone Access Based LEC Bypass Trunk Based Toll Switch Bypass Inter-operation between LEC and Toll Switch Bypass - Multiple providers - Smart phones and PSTN trunks - Internet or Private IP Nets

5. Advanced Technologies, 3Com ® SIP / MGCP / ISUP

6. Advanced Technologies, 3Com ® Which protocols go where? PSTN Interface (MGCP) IP Net (SIP) Trunk Gateways Residential Gateways Internet backbone PCs running Voice Apps Internet phones Devices with GUIs PSTN (SS7) SS7 PSTN dialing plans

7. Contact: ikhlaq_sidhu@3com.com