VoIP-PSTN Interoperability by Asterisk and SS7 Signalling
نویسنده
چکیده
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.
منابع مشابه
Voice over IP (VoIP) for Enterprise Networks: Performance Implications & Traffic Models
Voice over Internet Protocol (VoIP) is a rapidly emerging technology. Currently, the Internet is being wired to support voice and fax traffic. The widespread interest in VoIP is not necessarily the ability of IP to carry voice traffic but the ability to carry voice and fax traffic over data networks. The implications of this are far-reaching. That is, the Internet, for the most part, will event...
متن کاملLightweight security mechanism for PSTN-VoIP cooperation
In this paper we describe a new, lightweight security mechanism for PSTN-VoIP cooperation that is based on two information hiding techniques: digital watermarking and steganography. Proposed scheme is especially suitable for PSTN-IP-PSTN (toll-by-passing) scenario which nowadays is very popular application of IP Telephony systems. With the use of this mechanism we authenticate end-to-end transm...
متن کاملLightweight Security Mechanism for PSTN-IP Telephony Convergence
A new, lightweight security mechanism for the PSTN-VoIP hybrid networks is described. It is based on the two informationhiding techniques: audio watermarking and network steganography. The proposed scheme is suitable especially for the PSTN-IP-PSTN (toll-by-passing) scenario, which nowadays is a very popular application of the IP Telephony systems. Proposed mechanism can be used to authenticate...
متن کاملAn Overview of the Reliable Server Pooling Architecture
The convergence of classical PSTN and IP networks requires the transport of SS7 signalling over IP. Since SS7 has very strict availability requirements to the signalling components, redundancy is mandatory. The goal of the IETF RSerPool working group is to define a lightweight, flexible and realtime redundancy concept to fulfil the availability requirements of SS7: reliable server pooling (RSer...
متن کاملIntrusion Detection for Telephony Signalling
The Public Switched Telecommunications Network (PSTN) has becoming increasingly dependent on Signalling System 7 (SS7) due the drive to provide new services, such as Calling Name ID, Local Number Portability, the migration of other services to regional and national databases (e.g., E800, Calling Card, and eventually E911) and deregulation. Additionally, the explosion in the mobile communication...
متن کامل