Asterisk is an Open Source PBX - but how does it support larger installations? Can you scale it up to thousands of users, with hundreds of simultaneous calls? What about failover, backups and the famous blinking lamps? Olle Johansson goes through various models and describes where some of his current projects with strange names - Pinefrog, Pinana, Pinetree and Bufo fits into this picture.

5. The big question What do you want to do today?

17. Consider If you invest in a unified communication network today and design it for voice/PBX services only, it won’t work for future services

18. Without the Internet you still have an old telephony PBX. an old telephony PBX. an old telephony PBX.

19. Without the Internet you are on an isolated island. isolated island. isolated island. So how do we get away from it?

22. Kamailio & Asterisk Session Border controller Proxy Core proxy Proxy Registrar/Location server Asterisk PSTN Gateway Asterisk Voicemail Server Asterisk Feature/IVR Server Asterisk Proxy

25. A proxy SIP call and an Asterisk SIP call AUDIO STREAM AUDIO STREAMS One SIP call (dialog) One SIP call (dialog) from Alice to Asterisk One SIP call (dialog) from Asterisk to Bob Alice Bob Two SIP calls, and two media streams SIP Proxy Asterisk

27. Let’s play together Kamailio Proxy Asterisk PBX Call stateful Transaction stateful *

28. Asterisk’s view of SIP

29. Where we should be going... SIP SIP SIP Asterisk interoperating with a SIP infrastructure with full interoperability

30. SuperQuick Intro to Kamailio

44. Realtime in SIP with Dundi Dundi cluster SIP Database Server Calls and registrations are distributed with a SIP proxy or DNS or... * * * *

45. Realtime in SIP with SysName Database Server Calls and registrations are distributed with DNS The DB contains the SystemName of the server that accepted registration for outbound calls (NAT traversal) * * * *

47. Realtime hybrid

49. PBX hosting

53. Configuration

54. Configuring a peer for the proxy [mypeer] type=peer host=mypeer.mydomain.mytld context=mypeer-in With this configuration, we can place calls and receive calls. Asterisk will match on IP for incoming calls and send outbound calls to the proxy.

56. Sending calls [kamailio] type=peer host=mypeer.mydomain.mytld context=mypeer-in exten => 12345,1,dial(SIP/12345@kamailio) INVITE sip:12345@mypeer.mydomain.mytld To: sip:12345@mypeer.mydomain.mytld

57. Sending calls (2) [kamailio] type=peer host=mypeer.mydomain.mytld context=mypeer-in exten => 12345,1,dial(SIP/12345@kamailio! 0812346 ) INVITE sip:12345@mypeer.mydomain.mytld To: sip: 0812346 @mypeer.mydomain.mytld From: sip:yyyy@asterisk

58. Sending calls (2) [kamailio] type=peer host=mypeer.mydomain.mytld context=mypeer-in exten => 12345,1,dial(SIP/12345@kamailio! [email_address] ) INVITE sip:12345@mypeer.mydomain.mytld To: sip: 0812346 @kamailio.org From: sip:yyyy@asterisk

60. Example ; Get the full FROM Uri ; The username part is already the caller ID exten => _.,1,set(fromuri=${SIPCHANINFO(from)}) ; Get the domain and set it for the outbound call ; Note! This requires a patch. Exist in 1.6.2 and later. exten => _.,n,set(SIPFROMDOMAIN=${CUT(fromuri,@,2}) ; Dial out. The ! part only exist in 1.6.0 and later exten => _.,n,dial(SIP/${EXTEN}@${SIPDOMAIN}!${SIP_HEADER(To)}) The outbound proxy setting will route calls to the proxy

62. Asterisk media server

63. Playing prompts ; Don’t answer immediately, that confuses people exten => invalidnumber,1,ringing() exten => invalidnumber,n,wait(1) exten => invalidnumber,n,answer ; Let the RTP streams settle exten => invalidnumber,n,wait(.5) exten => invalidnumber,n,playback(invalid-number) ; Let the RTP streams settle exten => invalidnumber,n,wait(.5) exten => invalidnumber,n,hangup

64. Future and current work

70. Summary

74. Why are we still building with PSTN focus? PSTN SIP SIP SIP SIP SIP SIP Isolated islands of SIP!

75. Put the Internet where it belongs @ SIP SIP SIP SIP SIP SIP One Unified Communications Network PSTN PSTN PSTN PSTN PSTN PSTN

76. IPv6 is the new glue No NAT. Enough network addresses to build anything you need. Go and have fun. Discover the new oppurtunities with IPv6!

77. Questions? ?

78. © Copyright Edvina AB, Sollentuna, Sweden 2010. All rights reserved. Open Unified Communication Connecting Internet Users in real time.