1. SIP Gateway MOSA 3700 Feb 2, 2004

2. MOSA 3700 Standard SIP gateway (RFC 3261) The same as Cisco ATA 186 But Powerful

3. MOSA 3700 CO SIP Basic Structure MOSA 3704A Shanghai sip1@vodtel.com IP Network PC sip2@vodtel.com SIP Proxy Server Taipei sip4@vodtel.com SIP Phone sip3@vodtel.com MOSA 3704B

4. MOSA 3700 Make a SIP Call MOSA 3704A Shanghai 8621-2556-4586 sip1@vodtel.com Local PSTN SIP Phone 456@vodtel.com IP Network MOSA 3704A Local PSTN Taipei 8862-8226-3368 PC sip2@vodtel.com SIP Phone Book 111 sip2@vodtel.com Dial 456 Dial 111 SIP Proxy Server

5. MOSA 3700 Dialing Mode Standard Call: 1.Compare dialing plan 2.Become “ @proxy server address” go through SIP proxy. 3.Go through PSTN SIP Call Only: 1.Compare SIP Phone books 2.Become “ @proxy server address” go through SIP proxy PSTN Call Only : 1.Always go through PSTN

6. MOSA 3700 SIP Hunting Group SIP Entity 3 Local PSTN MOSA 3708 SIP Entity 2 SIP Entity 1

7. MOSA 3700 SIP Applications Soft-phone IP SHARING MOSA 3704A SIP Proxy Server & STUN Server IP Network MOSA 3704B SIP IP Phone IP SHARING Cisco 5300 PSTN CO

8. MOSA 3700 Send Faxes MOSA 3704B Shanghai sip1@vodtel.com IP Network SIP Proxy Server MOSA 3704B Taipei sip2@vodtel.com SIP Even SIP protocol does not support FAX, two AGW 3700 can send FAX each other through SIP

9. MOSA 3700 Behind NAT IP Network NAT Domain 2 NAT Domain 1 NAT Server Can Use Private IP Support STUN

10. MOSA 3700 SIP Interoperability Example Proxy Server 1.SIEMEMS 0-9.2.0 2.VOVIDA V1.5 3.Cisco IOS 2.0 SIP IP Phone 1.Cisco7960 SIP Phone POS3-04-1-00 2.Pingtel Instance Xpressa Softphone 1.Ubiquaty Soft phone Version 3-0-6 2.Windows Messenger Version 4.7 (4.7.0104) 3.X-Lite 2.0

11. MOSA 3700 Modules: 4 FXO + 4 FXS 4 FXS 8 FXO 8 FXS 37163708 2 FXO + 2 FXS 4 FXS 4 FXO 1 FXO + 3 FXS 3704A 3704B 3704C 3704D 1 FXO + 1 FXS 2 FXS 3702A 3702B Models

12. MOSA 3700 VODTEL Communications Inc. Thank You Headquarter: Taipei, Taiwan Tel: +886-2-82263368 Fax: +886-2-82263139 Liaison office: Nanjing, China Tel: +86-25-440-3714 WEB Site: www.vodtel.com.tw