Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony


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It allows an IP private branch exchange to be sure it is talking to another IP private branch exchange telephone and prevents rogue devices from hijacking sessions, impersonating devices or initiating denial of service attacks. This model breaks down if even one nonauthenticated device is allowed to participate.

Hersent Olivier Petit Jean Pierre Gurle David

The third problem is that encryption totally disables the network address translation essential for real-time communications on network edges. For this translation to work, signaling must be decrypted and re-encrypted. Finally, depending on what form is used, encryption makes signaling and media opaque to third-party security and management systems. As a result, if a signal is encrypted and a network problem occurs, it may be impossible to use a third-party system for diagnosis.

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While encryption is key, it is not the only real-time communications security technique. Other techniques use encryption in different ways to provide authentication, integrity and privacy.

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These techniques draw on the open-systems interconnection-layered model concept in which a higher layer relies on lower layers to perform a given function. Probably the most important and most difficult components of securing voice communications are establishing robust policies and procedures and implementing best practices, says Lee Sutterfield, chief executive officer, SecureLogix. Often when new technologies are adopted, policies and procedures lag behind, he points out.

Equally critical is the adoption of new policies and procedures by all organizational members. To fully benefit from the technology, enterprises need to issue overarching policy guidance that covers at least the need for voice network security, standards and guidance on voice security, the role of designated voice security managers, and training on voice network security. Securing voice communications is not just an information technology issue. At the top, policies and procedures must be implemented and prioritized by senior leadership.

At the worker level, individuals must follow policies and procedures because failing to do so creates inherent vulnerabilities.

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Finally, information technology organizations must design, implement and deliver secure networks. David L. Fraley Jr. Skip to main content. Search form Search. Close AD.


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By David L. Expectations for new capabilities tend to peak soon after a need is identified then fall significantly as soon as the challenges are identified. As a network starts to include additional devices, each entry point becomes a possible point of vulnerability. Another issue is that the key value of encryption is its use for authentication of devices. It allows an IP private branch exchange to be sure it is talking to another IP private branch exchange telephone and prevents rogue devices from hijacking sessions, impersonating devices or initiating denial of service attacks.

This model breaks down if even one nonauthenticated device is allowed to participate. The third problem is that encryption totally disables the network address translation essential for real-time communications on network edges.

Optimisation de la téléphonie par la voip

For this translation to work, signaling must be decrypted and re-encrypted. Finally, depending on what form is used, encryption makes signaling and media opaque to third-party security and management systems. As a result, if a signal is encrypted and a network problem occurs, it may be impossible to use a third-party system for diagnosis. While encryption is key, it is not the only real-time communications security technique. Other techniques use encryption in different ways to provide authentication, integrity and privacy.

These techniques draw on the open-systems interconnection-layered model concept in which a higher layer relies on lower layers to perform a given function. Probably the most important and most difficult components of securing voice communications are establishing robust policies and procedures and implementing best practices, says Lee Sutterfield, chief executive officer, SecureLogix.

Often when new technologies are adopted, policies and procedures lag behind, he points out.

IP Telephony. Deploying Voice-over-IP Protocols. Olivier Hersent - PDF

Equally critical is the adoption of new policies and procedures by all organizational members. To fully benefit from the technology, enterprises need to issue overarching policy guidance that covers at least the need for voice network security, standards and guidance on voice security, the role of designated voice security managers, and training on voice network security. Securing voice communications is not just an information technology issue. At the top, policies and procedures must be implemented and prioritized by senior leadership.

At the worker level, individuals must follow policies and procedures because failing to do so creates inherent vulnerabilities. Finally, information technology organizations must design, implement and deliver secure networks. David L. Fraley Jr. Skip to main content.

Search form Search. Close AD. By David L. Expectations for new capabilities tend to peak soon after a need is identified then fall significantly as soon as the challenges are identified. Most helpful customer reviews on Amazon. To understand most of the book, you need expert skills in telephony, electronic, signal processing, and ITU-T specifications. Go to Amazon. Back to top.

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Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony
Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony
Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony
Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony
Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony
Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony

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