1. OpenSER BoF Fall VON Boston 1 November 2007 Jim.Dalton@TransNexus.com

2. 1 Nov 2005OpenSER BoF - Fall VON Boston2 TransNexus & OpenSER TransNexus sells Operations and Billing Support Systems (OSS/BSS) for managing VoIP interconnection & peering. TransNexus Features: –Least Cost Routing –CDR analysis –Billing –Inter-domain security Our carrier customers introduced us to OpenSER. OSP protocol is OSS/BSS interface to OpenSER

3. 1 Nov 2005OpenSER BoF - Fall VON Boston3 Service Control Point OpenSER Routing Query & Response Call Detail Records Source Network Destination Network OSP Server

4. 1 Nov 2005OpenSER BoF - Fall VON Boston4 Inter-Domain Peering OpenSER Routing Query & Response Call Detail Records Source Network Destination Network OSP Server OpenSER Validate Peering Token

5. 1 Nov 2005OpenSER BoF - Fall VON Boston5 Details of Secure Peering ETSI OSP protocol defines standardized messages for the secure exchange IP based sessions. An OSP server is a web server Message Formats Multipurpose Internet Mail Extensions (MIME)‏ eXtensible Markup Language (XML)‏ Secure MIME Communication Protocols OSP Peering Protocol XML Presentation HTTP V1.0 SSL / TLS TCP port 80 TCP port 443 IP

6. 1 Nov 2005OpenSER BoF - Fall VON Boston6 OSP Message Example HTTP/1.1 200 OK Server: IP address of OSP server Date: Thu, 12 May 2005 18:32:59 GMT Connection: Keep-Alive Keep-Alive: timeout=3600, max=5000 Content-Length: 1996 Content-Type: text/plain 2005-05-12T18:32:59Z 4785098287068543017 MTExNTkxOTE3Ny45 Called Number [IP Address:Port] HTTP Header OSP Message

7. 1 Nov 2005OpenSER BoF - Fall VON Boston7 OSP Message Example (cont.)‏ 2005-05-12T18:32:59Z 4785098287068543017 MTExNTkxOTE3Ny45 Called Number [IP Address: Port] 14400 s 2005-05-12T18:27:59Z 2005-05-12T18:37:59Z sip Calling Number Vj0xCnI9MjE2NTUKYz0KQz03Nzc3Nzc3Nzc3Cmk9TVRFeE5Ua3hPVEUzTnk0NQphPT IwMDUtMDUtMTJUMTg6Mjc6NTlaCnU9MjAwNS0wNS0xMlQxODozNzo1OVoKST00Nz Unique Transaction ID per call Call ID from source device Called Number may be translated IP Address of Called Number Call authorized for 14440 seconds Call authorized to start in 10 minute window Protocol may be SIP, H323, IAX, … Digitally signed of token

8. 1 Nov 2005OpenSER BoF - Fall VON Boston8 OpenSER V1.2 Performance OpenSER has very high performance with OSP routing and accounting. OpenSER on a server with two, dual core Xeon CPUs can route and collect CDRs for over 500 million minutes per month of wholesale VoIP traffic. OpenSER Performance on a single core of an Intel 5140 2.33 CPU

9. 1 Nov 2005OpenSER BoF - Fall VON Boston9 More About OSP & OpenSER Instructions for building OpenSER with OSP support: http://www.transnexus.com/White%20Papers/Multi- Lateral_Peering_with_SER_V2.0.pdf http://www.transnexus.com/White%20Papers/Multi- Lateral_Peering_with_SER_V2.0.pdf OSP client library: http://sourceforge.net/projects/osp-toolkit/ OpenSER performance with OSP: http://www.transnexus.com/White%20Papers/OpenSER- SER_Comparison.htm http://www.transnexus.com/White%20Papers/OpenSER- SER_Comparison.htm