Compact Open Source Soft PBX for VoIP Solutions
in SOHO and SME Environments
Prof. Dr.-Ing. Diederich Wermser
Michael Iedema (BSC CS)

Hybrid Open Source PBX
for Private / SOHO / SME
Public Networks Private Network
VoIP-phone
External Askozia VoIP-phone VoIP-phone
extension (e.g.
Home Office)
VoIP-phone
LAN
Internet
VoIP-phone
ISDN/PSTN-phone WLAN
GSM-phone
Public ISDN/PSTN
ISDN/PSTN-phone
ISDN/PSTN-phone
ISDN/PSTN-phone
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Hybrid Open Source PBX
for VoIP / ISDN / Analog
• Easily Configurable
• Scalable from SOHO to SME
• From Embedded Hardware
up to Server
Public Networks Private Network
VoIP-phone
External Askozia VoIP-phone VoIP-phone
extension (e.g.
Home Office)
VoIP-phone
LAN
Internet
VoIP-phone
… …
ISDN/PSTN-phone WLAN
GSM-phone
Public ISDN/PSTN
ISDN/PSTN-phone
ISDN/PSTN-phone
ISDN/PSTN-phone
3

Features
less than 12MB firmware images,
Voicemail designed for embedded hardware
#
Technical
forwarded as e-mail attachment
and/or retrievable by dialing in
with pin
(e.g. PC Engines, Soekris,
Herologic $
"generic-pc" image runs
Call parking and transfers on any x86 based hardware
(blind and attended)
Fully supported PHP based webGUI
Video telephony configures phone and provider
Telephony
accounts for:
Configuration
Conference rooms SIP, IAX, ISDN and analog
with optional pin
Entire system configuration
! is stored in a single XMLfile
multilingual audio-prompt and
voicemail notification e-mails searchable database
(e.g. nl, en, fr, de, it, jp, ru, es, se, pl)
of call detail records
"
4

Overview
makes Asterisk more accessible
• simplifies configuration of most
common Scenarios
• more familiar terminology
• proper defaults
complete system
• new releases upgrade everything
(OS, Asterisk, etc:)
• single XML file stores configuration of
entire install
targets embedded hardware
• build a PBX with off-the-shelf
components
• low power-consumption
scales up to larger tasks with more
competent hardware and software
extensions
5

Background / Timeline
Sep
VoIP over
Jul WLAN
multilingual
Nov
prompts
Sep extensions
most common system
Jan interface types implemented
Jun
project begin supported - DID/DDI
first public beta
Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
2007 2008
1.0 released
ISDN Permanent after XX betas
provider + storage system Mar
phone support implemented
Aug Basis for e.g.
- IVR
Analog - call recording
provider + - music on hold
phone support Jan
Sep
6

Midterm Vision
• AskoziaPBX to become the market-dominant
hyprid SoftPBX for Private / SOHO / SME
Environments
• Self-connecting AskoziaPBX VoIP networks
throughout the Internet
… Organize your family and friends
7

Target Market
• Computer System Retailers
for example
• ISP / Telecom Operators
for example
… …
• Hardware Manufacturers
for example
• SOHO Users
8

Market Environment
Similar Projects Differences to AskoziaPBX
AsteriskNOW, Trixbox, Elastix
• complete systems with easy to use • much too large for smaller hardware platforms
Open Source
GUIs • too much expected of people new to Asterisk &
Linux
AstLinux
• targets embedded hardware • missing a user-friendly GUI
FRITZ!Box Fon
• excellent option for SOHOs • limited configuration options
Commercial
• built-in traffic shaping, routing, firewall • fixed, non-upgradable hardware components
and modem
• user-friendly
9

Standing
on the Shoulders of Giants
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Roadmap
expand incoming call routing options allow AskoziaPBXs to easily be
Telephony
• DID / DDI
clustered or coupled
• ACD Call Center Features
Configuration
improve network interface features:
• automatic detection
• multiple interfaces will be bridgable
• VLAN support
• WLAN support
Peer-Nodes
support for integrating AskoziaPBX with
back-end authentication / storage
Technical
permanent storage interface
• attached storage devices can be
defined to support “extended services“ Sub-Nodes
• ...permanent logs, full voicemail
system, additional audio packs
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Community / Support
• public svn, so far a single committer
• project's target audience is end-users rather than programmers
• the gold that our community produces:
- interface, device and provider interoperability reports
- ideas for missing features expected in other regions / cultures
- Translations
• community has donated and lent equipment for testing
• particularly evident in getting initial ISDN support implemented
• continued cooperation with isdn4bsd project in adding additional
support for unrecognized cards
• IKT ported efficient echo-canceller from Linux to FreeBSD, now
publicly available High international visibility and
recognition (e.g. Japan)
• One full time developer at
IKT
• Support team of 5 VoIP-
and Telecom-specialists
at IKT
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About IKT /
Some Cooperation Partners
IKT is an institute associated with the University of Applied Sciences
Braunschweig/ Wolfenbüttel; Germany.
We are specialized in the research and development of technologies and
solutions for IP based communication services, networks and applications.
Current R&D activities include technologies such as
• Voive over IP, Multimedia over IP
• Session Initiation Protocol (SIP)
• Open Source Software Packages; Asterisk, SER,
FreeSWITCH among others
• Presence Services
• IP Multimedia Subsystem (IMS), TISPAN
• Quality-of-Service-Mechanisms (QoS), IntServ, DiffServ,
MPLS
• Network "VoIP-Readiness„
• IPv6
• Protocol conformity tests, particularly TTCN-3
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www.itison-ikt.de

Hybrid Open Source PBX
for Private / SOHO / SME
Public Networks Private Network
Thanks for your attention!
VoIP-phone
External Askozia VoIP-phone VoIP-phone
extension (e.g.
Home Office)
VoIP-phone
LAN
Questions?
Internet
VoIP-phone
www.askozia.com
ISDN/PSTN-phone WLAN
GSM-phone
Public ISDN/PSTN
ISDN/PSTN-phone
ISDN/PSTN-phone
ISDN/PSTN-phone
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