Voice over Internet Protocol (VoIP) using Asterisk Sameer Verma

about myself

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

teach: those of us who can't do...

research: open source, mobility, content management

fun: ubuntu, maemo/nokia770, mythtv, nocat...

agenda introduction asterisk astlinux demo trixbox

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

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

more about networking... ...less about telephony

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

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

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

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

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

New – adoption issues

Migration from legacy systems will cost $$$

Innovative – requires a big change

How will telcos overbill?

???

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

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

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.

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.

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

Home/Hobby use

Small business use

Small-to-Medium Enterprise (SME) use

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

Hobby/home use

No POTS lines involved.

Extensions for family and friends.

All calls happen on PCs or ATAs.

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.

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.

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.

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.

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

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

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

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

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

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

Extension 101

Myself

Extension 201

Wife

Extension 301

Kid

sample family dial plan

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

ekiga softphone (SIP and H323)

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

iaxcomm

astlinux demo

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.

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.

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

trixbox demo

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

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

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