Asterisk PBX Presentation, 2006

Хувийн танилцуулга
Erkhembaatar Mungungadas
System Research, System Administrator

Юунд ашиглах вэ?
• Олон улсын телефон яриа

Customer Service / Small Office Home Office

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

VoIP технологийн танилцуулга
• Background:
– PBX (Private Branch Exchange)

• Audio codec:
– gsm, ulaw, alaw, g729

• Protocol:
– SIP, IAX, H323

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

• PBX (Private Branch Exchange)

Audio codec
(COmpression/DECompression)

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

• 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.

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.

H.323
IP transport mechanism for video-conferencing.

Asterisk PBX танилцуулга
• History
• Features
• Platform

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

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
...

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

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

Hardware Requirement

Telephone Devices
• Digital Interface Cards
•

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

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 )

Configuration (/etc/asterisk)
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asterisk.conf
modules.conf
extensions.conf
sip.conf
iax.conf
voicemail.conf
manager.conf

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

Phones
• Analog phones
• IP phones
• Software phones
X-Lite, DIAX, Kapanga

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

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})

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

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)

• 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)

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

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, …)

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

Asterisk PBX Presentation, 2006

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