The document provides an overview of Voice Over Internet Protocol (VoIP) using Asterisk, detailing its applications for home, small business, and small-to-medium enterprises. It discusses the advantages and disadvantages of VoIP, core components of Asterisk, and provides examples of dial plans for family and business use. Resources for further exploration and documentation are also included.

1. Voice over Internet Protocol (VoIP) using Asterisk Sameer Verma

2. about myself

3. teach: those of us who can't do... research: open source, mobility, content management fun: ubuntu, maemo/nokia770, mythtv, nocat... about myself

4. agenda introduction asterisk astlinux demo trixbox

5. family tree openpbx telephony free and open source proprietary asterisk gnu bayonne yate astlinux trixbox xorcom rapid xorcom rapid elastix VoIPonCD

6. VoIP more about networking... ...less about telephony

7. acronyms VoIP – Voice over Internet Protocol POTS – Plain Old Telephone Service ATA – Analog Telephone Adapter WiFi – Wireless Fidelity SIP – Session Initiation Protocol IAX – Inter-Asterisk eXchange PBX – Private Branch eXchange SBC – Single Board Computer

8. advantages Network based – digital by design IP based – economies of scale and scope Crossover to e-mail, IM, etc. CRM integration – e.g. SugarCRM No toll boundaries – IP goes everywhere One infrastructure to worry about

9. disadvantages New – adoption issues Migration from legacy systems will cost $$$ Innovative – requires a big change How will telcos overbill? ???

10. design as a network application If you assess your requirements from a network perspective, the design is more intuitive Think of VoIP as an application along the lines of e-mail Accounts follow a <name>@<registrar> syntax Account may map to a 7 or 10 digit phone number if system relays to POTS lines

11. asterisk – the project Asterisk was originally written by Mark Spencer of Digium, Inc. Released under GPL. Project began in 1999 or so. Core PBX + support services such as voicemail, call-forwarding, conference calling, etc.

12. three scenarios Home/Hobby use Small business use Small-to-Medium Enterprise (SME) use

13. scenario 1 Hobby/home use No POTS lines involved. Extensions for family and friends. All calls happen on PCs or ATAs.

14. scenario 2 Small business One or two POTS lines for incoming/outgoing calls. Extensions for Tech Support, Sales, Customer Service. Generic operator extension. Numeric extensions and voice mail for employees.

15. scenario 3 Small to mid-size business Multiple POTS and VoIP lines for incoming/outgoing calls. Aggregation of lines for multiple calls (rollover dialing). Specific lines and providers for long-distance and international calling.

16. astlinux Linux 2.6 Soekris and WRAP Asterisk 1.2 mini_httpd + PHP in CGI mode OpenSSH OpenSSL &quot;keydisk&quot; support traffic shaper (iptables+tc) tftp server &quot;PBX Only Mode&quot; - Asterisk only ftp server (vsftpd) Sangoma A101/102/104/S518 support SNMPD for lm_sensors rp-pppoe

17. astlinux Embedded Linux for Asterisk Live CD ISO is about 70 MB CF card fits under 64 MB Targeted for Soekris or WRAP SBCs Needs Pentium class 266 MHz or better GUI via web browser All scripts are editable via textarea boxes on web pages. Additional stats, PHP, httpd, available via browser

18. open source maturity model OSMM is a trademark of Navica . A chart like this will make you a hero at work. PHB image used without permission

22. sample dial plan Extension 101 Myself Extension 201 Wife Extension 301 Kid SIP SIP IAX

23. sample family dial plan

24. sample business dial plan Use IAX for end-points with lesser known variables such as NAT.

25. ekiga softphone (SIP and H323)

26. x-lite for MS Windows Image from http://graphics.cs.uni-sb.de/VoIP/fopra/node83.html

27. iaxcomm

28. astlinux demo

29. more complex solutions Trixbox Used to be Asterisk @ Home Combines several open source projects into one distro. CentOS based Caution: Wipes out the entire hard drive!!! If you simply want to “play” with VoIP, use AstLinux live CD.

30. dev kit used in demo TDM400P from Digium Photo from http://www.marlow.dk/images/asterisk/tdm400p-fxo-small.jpg IAXy S101 from Digium Photo from http://www.voip-info.org/users/385/25385/images/618/IAXy.jpg

31. trixbox demo

32. resources http://www.asterisk.org/ http://www.digium.com/ http://www.openpbx.org/ http://www.astlinux.org/ http://trixbox.org/ http://www.xorcom.com/rapid/index.html http://yate.null.ro/pmwiki/ http://www.gnu.org/software/bayonne/ http://www.voip-info.org/wiki/ http://www.voip-info.org/wiki/view/AstLinux http://www.sureteq.com/asterisk/trixboxv1.2.htm

33. contact