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Introduction
    Approaches for rural connectivity
                Timbaktu Case-study
    Survey of Hardware and Software...
Introduction
            Approaches for rural connectivity
                        Timbaktu Case-study
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                      Timbaktu Case-study
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          Approaches for rural connectivity
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            Approaches for rural connectivity
                        Timbaktu Case-study
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            Approaches for rural connectivity
                        Timbaktu Case-study
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            Approaches for rural connectivity
                        Timbaktu Case-study
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            Approaches for rural connectivity
                        Timbaktu Case-study
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            Approaches for rural connectivity
                        Timbaktu Case-study
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            Approaches for rural connectivity
                        Timbaktu Case-study
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          Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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          Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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  Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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         Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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  Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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Introduction
         Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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           Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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           Approaches for rural connectivity    Experiments 1: Sipura SPA3000 with Normal PC using Hard dis
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         Approaches for rural connectivity
                     Timbaktu Case-study
         Survey of Hardwa...
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         Approaches for rural connectivity
                     Timbaktu Case-study
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Introduction
  Approaches for rural connectivity
              Timbaktu Case-study
  Survey of Hardware and Software
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Design of PSTN - VoIP Gateway for rural environments

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Transcript of "Design of PSTN - VoIP Gateway for rural environments"

  1. 1. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Design of PSTN - VoIP Gateway for rural environments Sravana Kumar K Under Guidance of Prof. Sridhar Iyer Dept. of Computer Science & Engineering (KReSIT) 17th July 2007 Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  2. 2. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Outline 1 Introduction 2 Approaches for rural connectivity 3 Timbaktu Case-study 4 Survey of Hardware and Software 5 Affordable Gateway PBX 6 LDAP authentication in Asterisk PBX 7 Conclusion and Future work Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  3. 3. Introduction Approaches for rural connectivity Timbaktu Case-study Introduction Survey of Hardware and Software Rural environment constraints Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Introduction Around 70% of India’s population lives in villages. Typical village consist of around 250 households. Problem of Last mile rural connectivity. Traditional coverage proves too expensive. ARPU is too low to recover infrastructure and service costs. Several solutions exist for last-mile connectivity. DoT through VPT(Village Public Telephone) Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  4. 4. Introduction Approaches for rural connectivity Timbaktu Case-study Introduction Survey of Hardware and Software Rural environment constraints Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Rural environment constraints Income levels for rural India are lower than national average (INR2500 approx). Lack of power supply. Lack of knowledge on technology. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  5. 5. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Approaches for rural connectivity Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work An acceptable solution for rural connectivity would be: easy to deploy and maintain, low on operational expenditure, and low power consumption Approach 1: Using off-the-self components Use of off-the-self components to build intra-connectivity in the village Approach 2: Design VoIP Gateway PBX Design a VoIP gateway PBX to minimize the cost of the entire system for rural deployment Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  6. 6. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Approaches for rural connectivity Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work An acceptable solution for rural connectivity would be: easy to deploy and maintain, low on operational expenditure, and low power consumption Approach 1: Using off-the-self components Use of off-the-self components to build intra-connectivity in the village Approach 2: Design VoIP Gateway PBX Design a VoIP gateway PBX to minimize the cost of the entire system for rural deployment Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  7. 7. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Approaches for rural connectivity Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work An acceptable solution for rural connectivity would be: easy to deploy and maintain, low on operational expenditure, and low power consumption Approach 1: Using off-the-self components Use of off-the-self components to build intra-connectivity in the village Approach 2: Design VoIP Gateway PBX Design a VoIP gateway PBX to minimize the cost of the entire system for rural deployment Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  8. 8. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Timbaktu Collective is a remote location and mountainous area, lack of cellular coverage, and no A/C power supply. Problem in Communication its connectivity is through a single PSTN line, each time a user needs to walk to the central phone to make and receive a call, and solar panels(DC power) are installed to meet power requirements. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  9. 9. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Timbaktu Collective is a remote location and mountainous area, lack of cellular coverage, and no A/C power supply. Problem in Communication its connectivity is through a single PSTN line, each time a user needs to walk to the central phone to make and receive a call, and solar panels(DC power) are installed to meet power requirements. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  10. 10. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Proposed Architecture External gateway interfaces with the software exchange. Software exchange is connected to user devices through Intra-village network. Software exchange includes VoIP gateway and soft-PBX. VoIP gateway interfaces a PoP with an IP network. Soft-PBX allow VoIP user to make and receive calls. Intra-village network is hybrid network, (Ethernet+WiFi) Connecting nearby places with ethernet. Connecting far places with WiFi. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  11. 11. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Intra-village connectivity Case-study setup Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  12. 12. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Case-study results We proposed an architecture for rural scenario. We performed VoIP tests with different clients. Quality of the calls were very good except with the Simputer. Simputer have processing delays and codec problems. Device(Fr/To) PC Simputer Phone Landline PC Very good Poor Good Very good Simputer Average Poor Poor Average Phone Good Average Good Very good Landline Very good Average Very good - Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  13. 13. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Wireless architecture for Asterisk testing Asterisk Response Times in wired and wireless media Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  14. 14. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Motivation We can use off-the-self approach to solve connectivity problem in rural environment. This approach is still expensive for rural scenario, approximately Rs. 42,000. Problem Statement We have focused on solving the following problems: We have to design a single integrated DC-powered device that combines the Gateway and the Soft PBX. Setup Asterisk to authenticate users using OpenLDAP. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  15. 15. Introduction Problem in Communication Approaches for rural connectivity Proposed Architecture Timbaktu Case-study Case-study setup Survey of Hardware and Software VoIP tests Affordable Gateway PBX Asterisk Performance LDAP authentication in Asterisk PBX Problem Statement Conclusion and Future work Motivation We can use off-the-self approach to solve connectivity problem in rural environment. This approach is still expensive for rural scenario, approximately Rs. 42,000. Problem Statement We have focused on solving the following problems: We have to design a single integrated DC-powered device that combines the Gateway and the Soft PBX. Setup Asterisk to authenticate users using OpenLDAP. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  16. 16. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work FXO interface Hardware points to the Telcom office FXS interface points to the subscriber Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  17. 17. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work FXO interface Hardware points to the Telcom office FXS interface points to the subscriber Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  18. 18. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work FXO interface Hardware points to the Telcom office FXS interface points to the subscriber Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  19. 19. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Asterisk PBX Open source Soft PBX. Supports many protocols. Needs no hardware for VoIP. AstLinux Linux distribution of Asterisk Occupies around 40MB Runs on flash memory Softphone Making calls over Internet Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  20. 20. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Asterisk PBX Open source Soft PBX. Supports many protocols. Needs no hardware for VoIP. AstLinux Linux distribution of Asterisk Occupies around 40MB Runs on flash memory Softphone Making calls over Internet Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  21. 21. Introduction Approaches for rural connectivity Timbaktu Case-study Hardware Survey of Hardware and Software Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Asterisk PBX Open source Soft PBX. Supports many protocols. Needs no hardware for VoIP. AstLinux Linux distribution of Asterisk Occupies around 40MB Runs on flash memory Softphone Making calls over Internet Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  22. 22. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Experiments 1: Sipura SPA3000 with Normal PC Advantages: This setup is easy to install. Sipura provides a nice web interface for its configuration. SPA3000 provides us the facility for fine tuning the system. Disadvantages: This setup is the most expensive in terms of cost and power consumption. Asterisk server is installed on a computer system, causing wastage of computing resources. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  23. 23. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Experiments 2: Sipura SPA3000 with VIA Motherboard Advantages: Power and cost reduction from last experiment. VIA motherboard takes less DC power, 12VDC. In this setup we have made efficient usage of computational resources. The cost of the system is reduced by using Via motherboard. Disadvantages: Still gateway cost is high. SPA-3000 takes additional power. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  24. 24. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  25. 25. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Experiments 3: Digium X100P with VIA Motherboard Advantages: Cost reduction from last experiment. X100P is cheaper than SPA-3000. X100P is a PCI card, it won’t take extra power. Disadvantages: No fine tuning is possible for the system. The power consumption of the system is still high because of hard disk. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  26. 26. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  27. 27. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Experiments 4: V.92 data MODEM with VIA Motherboard Advantages: Power and cost reduction from last experiment. MODEM is much more cheaper than X100P. Using normal data MODEM, entire gateway cost is reduced. Replaced hard disk with IDE flash, so entire system become more compact. Efficient usage power resources. Disadvantages: Code modification is needed. System life is reduced because of flash memory. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  28. 28. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Cost comparison System Cost SPA + PC Rs. 41,350 SPA + VIA Rs. 26,350 X100P + VIA Rs. 21,850 V.92 + VIA Rs. 19,850 Conclusion of Gateway PBX Our proposed solution to Gateway PBX is V.92 data MODEM with VIA motherboard using IDE flash memory Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  29. 29. Introduction Approaches for rural connectivity Experiments 1: Sipura SPA3000 with Normal PC using Hard dis Timbaktu Case-study Experiments 2: Sipura SPA3000 with VIA Motherboard using H Survey of Hardware and Software Experiments 3: Digium X100P with VIA Motherboard using Har Affordable Gateway PBX Experiments 4: V.92 data MODEM with VIA Motherboard using LDAP authentication in Asterisk PBX Conclusion of Gateway PBX Conclusion and Future work Cost comparison System Cost SPA + PC Rs. 41,350 SPA + VIA Rs. 26,350 X100P + VIA Rs. 21,850 V.92 + VIA Rs. 19,850 Conclusion of Gateway PBX Our proposed solution to Gateway PBX is V.92 data MODEM with VIA motherboard using IDE flash memory Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  30. 30. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work Asterisk has its own authentication, details stored in sip.conf. Large organizations maintain some external authentication mechanism. Many of organizations provide VoIP telephony. For unique authentication, need to provide an external authentication in Asterisk. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  31. 31. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work Simple Registration sip.conf [username] type=friend context=from-sip secret=secret host=dynamic Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  32. 32. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work Simple Registration sip.conf [username] type=friend context=from-sip secret=secret host=dynamic Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  33. 33. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work LDAP Client: PAM we used pam as a LDAP client New sip.conf PAM allows integration of [username] various authentication type=friend technologies such as context=from-sip standard UNIX and LDAP auth_type=pam etc. host=dynamic patched Asterisk with pam_ldap Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  34. 34. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work LDAP Client: PAM we used pam as a LDAP client New sip.conf PAM allows integration of [username] various authentication type=friend technologies such as context=from-sip standard UNIX and LDAP auth_type=pam etc. host=dynamic patched Asterisk with pam_ldap Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  35. 35. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work Registration with LDAP server Sequence Diagram Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  36. 36. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work Implementation load_module(): loads auth.conf parse_config(): parse the auth.conf ldap_connect(): connects to LDAP server ast_parse_secret(): parse the secret string for Asterisk get_ldap_password(): finds the the LDAP password for the user check_auth: check the authentication with user information Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  37. 37. Introduction Introduction Approaches for rural connectivity Simple Registration Timbaktu Case-study LDAP Client: PAM Survey of Hardware and Software Registration with LDAP server Affordable Gateway PBX Implementation Details LDAP authentication in Asterisk PBX Results Conclusion and Future work User Registration with LDAP Asterisk connects LDAP Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  38. 38. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Conclusion Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Conclusion Proposed a affordable Gateway PBX with inexpensive devices. Configured Asterisk to authenticate with LDAP server. Future work Need to do hardware implemention for Gateway PBX. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  39. 39. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Conclusion Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Conclusion Proposed a affordable Gateway PBX with inexpensive devices. Configured Asterisk to authenticate with LDAP server. Future work Need to do hardware implemention for Gateway PBX. Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
  40. 40. Introduction Approaches for rural connectivity Timbaktu Case-study Survey of Hardware and Software Affordable Gateway PBX LDAP authentication in Asterisk PBX Conclusion and Future work Thank You Sravana Kumar K Design of PSTN - VoIP Gateway for rural environments
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