VoIP-PSTN Interoperability by Asterisk and SS7 Signalling

  • Jan Rudinsky
Conference paper
Part of the IFIP — The International Federation for Information Processing book series (IFIPAICT, volume 245)


PSTN, the world’s circuit-switched network, has employed Signalling System #7 as its protocol suite for international and national interconnection during past decades. VoIP networks however have developed different signalling protocols suitable for IP environment. Gateways interconnecting VoIP and PSTN networks are usually proprietary and expensive solutions. Today an open source software can perform this function. As an example we have decided to test Asterisk PBX and two open source implementations of SS7, the SS7 channel driver and SS7 library. We have tested these solutions for interconnection to PSTN and run various tests to verify the implementation functionality.


Session Initiation Protocol Interactive Voice Response Personal Wireless Communication Signalling Protocol Open Source Implementation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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    T. Russell, “Signalling System #7”, McGraw-Hill (2002), ISBN 0-07-13 8772-2Google Scholar

Copyright information

© International Federation for Information Processing 2007

Authors and Affiliations

  • Jan Rudinsky
    • 1
  1. 1.CESNET, z. s. p. o.Praha 6Czech Republic

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