This document provides an overview of open source PBX software called Asterisk. It discusses VoIP technologies including codecs, protocols and PBX features. It also outlines how to install, configure and use Asterisk to set up a PBX system with channels, phones, IVRs and billing integration. Hardware requirements and options for interfaces are presented along with examples of configuration files. The document demonstrates how to register softphones and test calling between Asterisk and other VoIP systems.

1. Open Source Software PBX

2. Хувийн танилцуулга
Erkhembaatar Mungungadas
System Research, System Administrator

3. Юунд ашиглах вэ?
• Олон улсын телефон яриа

4. Customer Service / Small Office Home Office

5. Customer Service / Small Office Home Office

6. Агуулга
• 1. VoIP технологийн танилцуулга
– background, audio codec, protocol
• 2. Asterisk PBX танилцуулга
– history, features, platforms
• 3. Asterisk PBX хэрэглээ
– Hardware, Telephone Devices, Installation, Configuration
Channels, Phones, Video Transmission
Dialing Plans/IVR, AGI, Asterisk-IM, Billing System

7. VoIP технологийн танилцуулга
• Background:
– PBX (Private Branch Exchange)
• Audio codec:
– gsm, ulaw, alaw, g729
• Protocol:
– SIP, IAX, H323

8. VoIP технологийн танилцуулга
PBX (Private Branch Exchange)
Features
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Establishing connections
(circuits) between the
telephone sets of two users
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Channeling voice signals
between the users
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Providing information for
accounting purposes

9. VoIP технологийн танилцуулга
• PBX (Private Branch Exchange)

10. VoIP технологийн танилцуулга
Audio codec
(COmpression/DECompression)

11. VoIP технологийн танилцуулга
Protocols
• SIP (Session Intitation Protocol)
• IAX (Inter-Asterisk Exchange)
• H.323 (ITU standard)

12. VoIP технологийн танилцуулга
• SIP (Session Intitation Protocol)
– SIP, the session intitation protocol, is the IETF protocol for VOIP and
other text and multimedia sessions, like instant messaging, video and
other services.

13. VoIP технологийн танилцуулга
IAX (Inter-Asterisk Exchange)
developed by Digium for the purpose of communicating with other
Asterisk servers (hence “the Inter-Asterisk eXchange protocol”).
IAX is a transport protocol that uses a single UDP port (4569) for both
the channel signaling and RTP streams.

14. VoIP технологийн танилцуулга
H.323
IP transport mechanism for video-conferencing.

15. Asterisk PBX танилцуулга
• History
• Features
• Platform

16. Asterisk PBX танилцуулга
History
Creator Mark Spencer of Digium, Inc.
CentOS based All-in-One
Embedded Asterisk System

17. Asterisk PBX танилцуулга
Features
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Alarm Receiver
Append Message
Calling Cards
Conference Bridging
Distinctive Ring
Protocol Conversion (IAX->SIP)
Roaming Extensions
Supervised Transfer
Transcoding (ulaw->gsm etc.)
Three-way Calling
Voicemail to email (attach audio file)
Web Voicemail Interface
...

18. Asterisk PBX танилцуулга
Platform:
• Unix / Linux / Mac OS X
• Win32 http://www.asteriskwin32.com/
Hardware supported with two channels:
TAPI channel:
support TAPI compatible hardware full duplex & half duplex devices
(most of voice modem devices).
CAPI channel:
ISDN device CAPI compatible

19. Asterisk PBX хэрэглээ
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Hardware Requirement
Telephone Devices
Installation, Configuration
Channels
Phones
Video Transmission
Dialing Plans/IVR, AGI, Festival, Asterisk-IM
Billing System, PC-2-PC, International Calling

20. Asterisk PBX хэрэглээ
Hardware Requirement

21. Asterisk PBX хэрэглээ
Telephone Devices
• Digital Interface Cards
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Digium Wildcard TE205P
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PCI 5 / E1 and T1/J1 channel bank
• Analog Interface Cards
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Digium Wildcard TDM400P
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PCI 2.2 / FXS and FXO

22. Asterisk PBX хэрэглээ
Installation
• Debian GNU/Linux Sarge
libpri*
zaptel
apt-get install asterisk
asterisk-chan-capi
asterisk-config
asterisk-dev
asterisk-doc
asterisk-h323
asterisk-oh323
asterisk-sounds-main
asterisk-web-vmail
( apt-get install asterisk )

23. Asterisk PBX хэрэглээ
Configuration (/etc/asterisk)
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asterisk.conf
modules.conf
extensions.conf
sip.conf
iax.conf
voicemail.conf
manager.conf

24. Asterisk PBX хэрэглээ
Channels
SIP (sip.conf, extensions.conf)
[sipuser]
type=friend
callerid=("SIP User" <1000>)
username=sipuser
exten => s,1,Dial(SIP/{$EXTEN})
IAX / IAX2 (iax.conf, extensions.conf)
IAX/[<user>[:<secret>]@]<peer>[:<portno>][/<exten>[@<context>][/<options>]]
IAX/mark:asdf@myserver/6275@default – Call to "myserver" using "mark" as
username and "asdf" as password, and requesting extension 6275 in default context

25. Asterisk PBX хэрэглээ
Phones
• Analog phones
• IP phones
• Software phones
X-Lite, DIAX, Kapanga

26. Asterisk PBX хэрэглээ
Video Transmission
• Supported Channels :
– SIP, IAX2
• Supported Video Codecs :
– H.261, H.263, H.263p
• Supported Video Codecs :
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AuPix SIP and H.323 video phone
iFon: for PocketPC PDAs
Microsoft Windows Messenger for Windows PC's
X-Lite, eyeBeam for Windows and OSX
Kapanga Sip Video Phone

27. Asterisk PBX хэрэглээ
Dialing Plans
extensions.conf (/etc/asterisk)
[general]
static=yes
writeprotect=yes
videosupport=yes
[globals]
PHONE1=Zap/1
PHONE2=SIP/6002
Extensions
[local]
exten => 6601,1,Macro(oneline,${PHONE1})
exten => 6602,1,Macro(oneline,${PHONE2})

28. Asterisk PBX хэрэглээ
IVR (Interactive Voice Responder)
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[default]
exten => s,1,Answer
exten => s,2,SetMusicOnHold(default)
exten => s,3,DigitTimeout,5
exten => s,4,ResponseTimeout,10
;SAI menu - 1 for tech support, 2 for voicemail
exten => s,5,Background(sai-welcome)
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; Tech Support
exten => 1,1,AGI(dima-test.agi)
exten => 1,2,Queue(rep-tech)
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; Leave Voicemail
exten => 2,1,VoicemailMain()
exten => 2,2,Hangup

29. Asterisk PBX хэрэглээ
AGI (Asterisk Gateway Interface)
The Asterisk Gateway Interface provides external programs may
control the Asterisk dialplan. Communicate with relational databases
(such as PostgreSQL or MySQL)
/var/lib/asterisk/agibin
Example:
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exten => 123,1,Answer( )
exten => 123,2,AGI(agi-test.agi)

30. Asterisk PBX хэрэглээ
• Festival (Text-to-Speech)
Festival is a popular open source text-to-speech engine.
• Example: (extensions.conf)
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exten => 123,1,Answer( )
exten => 123,2,Festival(Asterisk and Festival are working together)

31. Asterisk PBX хэрэглээ
• Asterisk-IM (Jive Software Integration)
• Integration component to Asterisk for Jive's
Jabber/XMPP server

32. Asterisk PBX хэрэглээ
Billing System: Asterisk2Billing
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Authenticate with the use of a Cardnumber
Reporting
Rate-engine
Simultaneous access for same card
SIP/IAX Friends Management
post-pay & prepay
Recurring service over the card
Reload Asterisk through UI & manager
IVR Customization - (say balance, forwarding, …)

33. Asterisk PBX хэрэглээ
Test Calling
• AsteriskWin32 PBX
• X-Lite softphone
• Configuration
• VoipJet.com Registration
• Test Calling …

34. Thank you!
Any questions!