1. Business and Technical details Mark Spencer

2. What is Asterisk? “Asterisk is an Open Source,
hybrid, TDM, and packet voice PBX.
It is also an Interactive Voice Response platform with Automatic Call Distributor functionality.”

3. Asterisk is fully Open Source* !

4. Asterisk supports TDM Technologies

5. Asterisk is a Private Branch Exchange (PBX)

6. Basic Call Features

7. Advanced Features

8. Asterisk Supports VoIP (Packet Voice)

9. Asterisk is an Interactive Voice Response (IVR) Platform

10. Supported Digium Zaptel TDM Hardware
TE405P / TE410P (Quad T1 / E1 Interface)

11. Supported Digium Zaptel TDM Hardware
T100P (Single T1/PRI interface—PCI)

12. Supported Digium Zaptel TDM Hardware
E100P (Single E1/PRA Interface—PCI)

13. Supported Digium Zaptel TDM Hardware
TDM400P (Quad Modular FXS/FXO)
FXO Module
FXS Module

14. Supported Digium Zaptel TDM Hardware
X100P (Single Analog Interface—PCI)

15. Supported Digium Zaptel TDM Hardware
IAXy – Single FXS interface with Ethernet Backend

16. Supported Hardware Linux telephony (/dev/phone) interface
Quicknet Internet Phonejack
Quicknet Internet Linejack
Quicknet Internet PhoneCard
ISDN4Linux supported cards
OSS or ALSA compatible full duplex sound cards
CAPI compatible ISDN (contributed)
Voicetronix (contributed)

17. Why Asterisk for Telecom?*?

18. Asterisk as a Black Box

19. Conventional Softswitch Network

20. Where Asterisk Fits

21. The Big Picture

22. Example: 1x1 PBX

23. Example: 8x16 PBX

24. Small/Medium Enterprise

25. High Density IVR/Conferencing

26. Why Open Source— For Customers?

27. Why Open Source— For Suppliers?

28. Asterisk Architecture
(Add some things?)

29. The Asterisk Dialplan

30. Extension Contexts

31. Uses of Extension Contexts
Security
Voice Menu
Authenticated Services
PBX Multi-Hosting
Callback Services
Daytime/Nightime Modes

32. Example Asterisk Dialplan

33. Extensions
Conventional dialplans assign extension to physical interface
Asterisk assigns extensions to list of applications
Execution goes through priorities, one by one
Applications can modify call flow
Seamlessly integrates IVR apps into PBX
May route by dialled and calling number

34. Extension Names May be any number of digits (max 128)
May be string literals
May pattern match (when preceeded with “_”)
'N' – matches digits from 2 to 9
'X' – matches digits from 0 to 9
'.' – signifies end of pattern matching

35. Special Extensions 's' – “start” 't' – “timeout” 'i' – “invalid”
'o' – “operator”
'h' – “hangup”

36. Simple Extension with Voicemail
exten => 600,1,Dial(Zap/9,15)
exten => 600,2,Voic (u600)
exten => 600,102,Voic (b600)
Try dialing on Zap/9 for up to 15 seconds. If there is no answer send them to voic , preceeded by “unavailable” message. If the interface is busy, send them to voic with a “busy” message.

37. Extension for Psycho Ex-girlfriend

38. Example: Operator

39. Example: Outgoing Line with Least Cost Routing

40. Example: AGI Integration
exten => s,1,AGI(agi-lookup.agi)
exten => s,2,Background(intro)
exten => 100,1,AGI(agi-save.agi)
exten => 100,2,Dial(Zap/9,15)
exten => 100,3,Voic (u100)
exten => 120,1,AGI(agi-save.agi)
exten => 120,2,Dial(Zap/24,15)
exten => 120,3,Voic (u101)
When an incoming call comes in, send it first to “agi- lookup.agi” which checks the caller's Caller*ID against a database and route them to the last person they spoke with.

41. Example: Ringback [ringback] exten => s,1,Ringing
exten => s,2,Wait(1)
exten => s,3,Congestion
exten => h,1,System(callback)
[default]
exten => 1234,1,DISA(4321,trusted)
exten => 1235,1,Goto(ringback,s,1)
When extension 1235 is dialled, the call is sent into the “ringback” context which eventually calls a script to call the user and dump them into the DISA (with a password) when they answer.

42. Example: Macro [macro-stdexten] exten => s,1,Dial(${ARG1},20)
exten => s,2,Voic (u${MACRO_EXTEN})
exten => s,102,Voic (b${MACRO_EXTEN})
[default]
exten => 1234,1,Macro(stdexten,Zap/1)
exten => 1235,1,Macro(stdexten,Zap/2&Zap/3)
Extension 1234 and 1235 are essentially identical, dialing one (and two) interfaces for up to 20 seconds, and doing voic .

43. Configuration Files /etc/asterisk -- Location of config files
alsa.conf and oss.conf -- Sound card configuration
asterisk.adsi -- ADSI feature script
extensions.conf -- Static dialplan
iax.conf IAX users, peers, friends, and parameters

44. More Configuration Files
meetme.conf -- Meetme conference configuration
modules.conf -- Modules, preloads, globals, and noloads
musiconhold.conf -- Music on hold configuration
voic .conf -- Voic mailboxes, general parameters
zapata.conf -- Zaptel compatible device configuration

45. Programmability/Extensibility
DialPlan
AGI
C-level API

46. More Resources for Asterisk
Following commands at CLI> prompt:
help
show applications
show application <foo>
show dialplan

47. Helpful web sites
asterisk.org
markocam.com

48. Where do we go from here? *?

49. http://www.asterisk.org http://www.digium.com
Thank you!