voopix Building the Educa4onal VoIP Cloud in Croa4a

Transcription

1 voopix Building the Educa4onal VoIP Cloud in Croa4a Branko Radojević, M.Sc. Deputy CEO September (v 2.42)

2 CARNet Who we are & what we do? Public Institution funded from National Budget NREN National Research and Education Network Over 20 years ISP for Educational Institutions in Croatia (schools, universities, research institutes, ministry, agencies, public hospitals, etc.) 3000 locations in Croatia Since 2004 adding more and more services for our members: (National Educational AA infrastructure, CMS for schools, LMS for schools, National e-learning portal, National portal for schools, Content filtering for schools, (many, many more), and voopix J ) All our services are free for our member institutions

3 CARNet voopix goals To interconnect all our member institutions (3000 locations) to a single VoIP cloud and to provide to them: Free telephony service between institutions Interconnect different locations of the same institution Let them use legacy PBXs with our system Provide advanced telephony possibilities available only in VoIP PBXs Provide free international calls to certain destinations for free TRY TO BE AS TRANSPARENT TO THEM AS POSSIBLE Open their eyes and let them discard legacy PBXs and move to VoIP

4 How we arrived to this idea?

5 voopix - Evolu4on It all started at the University of Dubrovnik in Proprietary phones 1x ISDN PRI Telco Legacy PBX 1x ISDN PRI University of Dubrovnik

6 voopix Evolu4on (cont d) In a matter of no time... Telco University of Dubrovnik University of Dubrovnik DUNDi University of Dubrovnik University of Dubrovnik University of Dubrovnik

7 voopix Next Step In 2005 I ve got married, moved to Zagreb and changed my employer to the current one J.

8 voopix Next Step (cont d) CARNet my new employer already has ordered new VoIP PBX (normal PBX functionality + Call Center), but it s a Cisco Call Manager When it arrived, it took just few days to add an Asterisk to CCM (connected with SIP trunk), and to bring up DUNDi cloud and interconnect it with the Asterisks at the University of Dubrovnik It proved to be reliable solution, so why don t expand it? voopix was born J

9 voopix Building the core We started to build voopix core, based on five servers running Asterisk positioned in five of our largest POPs RI ZG OS Connections shown are logical DUNDI peering connections No clustering at this time ST DU

10 voopix Legacy PBXs Our members don t want to throw away their working PBXs. Some of them were purchased recently L We had to find a way to transparently connect them to our system. Obviously, we are talking about hundreds of different combinations of PBXs, software, cards, setups, etc. Telco connection is also non-unified: from R2/MFC, ISDN BRI, ISDN PRI and some SIP trunks (recently). We had to put our box between PBX and the Telco connection in order to intercept calls. Our solution should be reliable.

11 voopix Appliance (large) Custom designed in CARNet Runs Linux (debian lenny) + Asterisk 2x or 4x ISDN PRI voice card installed No hard drives It has custom made failover switch that can bypass the card and connect back PBX directly to Telco. PBX Telco

12 Interconnec4ng voopix and PBX CARNet voopix voopix app. Old phones Legacy PBX Telekom operator BASIC

13 Interconnec4ng voopix and PBX (2) CARNet voopix voopix app. Old phones Legacy PBX Telekom operator BASIC HYBRID

14 Interconnec4ng voopix and PBX(3) CARNet voopix voopix app. Old phones Legacy PBX Telekom operator BASIC HYBRID ADVANCED

15 voopix - Appliance (cont s)

16 voopix - Appliance (cont s) FAILOVER SWITCH VOICE CARD NETWORK

17 voopix Appliance (small) Commercially available Runs Linux + Asterisk 1x FXS port installed 2 module slots available for line cards: 4x FXO, 4xFXS, 2xBRI, 2xGSM No hard drives, USB and SD Card reader included It has failover switch that can bypass two FXO and FXS ports directly to Telco.

18 voopix Call flows (available number) DUNDi voopix context ISDN PRI CALL ISDN PRI Telco ISDN Network Legacy PBX CDR (RADIUS)/LOG Server

19 voopix Call flows (unavailable number) DUNDi voopix context ISDN PRI CALL ISDN PRI CALL Telco ISDN Network Legacy PBX CDR (RADIUS)/LOG Server

20 voopix - Today Around 110 locations (our first target were the institutions with larger phone installations and those considered most interesting ones) We expect to double the number until the end of

21 Problems we encountered - AOC AOC = Advice Of Charge (D-During, E-End) ISDN PRI CALL AOC-D AOC-E Telco ISDN Network Legacy PBX

22 Problems we encountered AOC (cont d) AOC = Advice Of Charge (D-During, E-End) Legacy PBX AOC-D ISDN PRI CALL AOC-E ISDN PRI CALL AOC-D AOC-E Telco ISDN Network

23 Asterisk Implementation Overview (Technical Details)

24 Node becomes available Telco ISDN Network ISDN PRI IAX2 peering + registration RI [iax-pbx-reg] ZG exten=> _ [5-7]XX DUNDi voopix context OS _ [5-7]XX ST Legacy PBX Numbers: (51) to DU

25 Node becomes unavailable Telco ISDN Network ISDN PRI IAX2 peering + registration RI [iax-pbx-reg] ZG exten=> _ [5-7]XX DUNDi voopix context OS _ [5-7]XX ST Legacy PBX Numbers: (51) to NAGIOS Server DU

26 Interconnection with TERENA NRENUM.net

27 NRENUM.net Since the two systems (ENUM and DUNDi) are incompatible, we had to build gateway service Outgoing calls are easy to implement, since Asterisk has built-in ENUM support that we are using Publishing our numbers to NRENUM tree were more difficult, since our system is highly dynamical, and DNS zones are more statical We built on top of PowerDNS software that has ability to query not only its internal database, but also invoke script for subqueries. So, for every query that we receive through ENUM, we do subquery in DUNDi and return results.

28 Advanced Telephony Functionality provided by voopix

29 Skype to PBX We allow calls from Skype to any number in our system Often used to place calls directly from web pages

30 Users traveling around the World We provide the possibility for user traveling around the World to use softphones which allows them to become extensions on their PBX It is also useful to someone working from home ZoIPer is a popular (and free) softphone which is beside having SIP protocol also provides IAX2 which has much less problems traversing NATs Now available for Windows, MacOS, ipad/iphone, Android, Windows Phone

31 Centralized Services (logging, monitoring, configuration, )

32 Centralized Services Generally, we tend to use Open Source software: Logging: Syslog NG Fault Monitoring: Nagios Graphs + Performance Monitoring: Munin Accounting: FreeRADIUS + mysql Configuration+User Mgmt.+ : Puppet

33 voopix Future?

34 voopix Future? Scalability problem - not yet seen, but may become an issue Web portal for members (billing, some setup, etc.) Solution for smaller institutions (Schools on small islands) Shown interest from other public/government institutions Try to animate institutions in other countries to start up similar project and to peer with us - we re ready to help Add more advanced functions to our system

35 Open Platform

36 Open Plaborm The idea here is to be able to create VoIP infrastructure on the Open Platform, which doesn t rely on a single vendor, single technology or a proprietary solution At any time, if there is a technology or protocol that shows up to be superior to currently used, we can move to them without investing in new equipment or paying additional licenses By using central configuration, we can switch hundreds of appliances to new system in a matter of hours

37 Thank you for your time! All questions and suggestions are more then welcome.