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117 SIP related internet drafts (IETF).
8 new and updated drafts posted in the last 14 days.

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Overview of H.323 - SIP Interworking (Radvision)hot!

16.05.2001

Looking at IP networks and VoIP, it is clear that both protocols - SIP and H.323 - are widely deployed and here to stay. For carriers wishing to provide global VoIP services, the interconnection of these disparate networks into a unified VoIP network is an urgent and high priority. The SIP-H.323 InterWorking Function (IWF) has been defined as a logical entity that allows the interworking between the SIP and H.323 protocols. This includes call sequence mapping, message parameter mapping, translation between H.245 and SDP, state machines, and the handling of different call procedures.

This paper looks at the issues and challenges of the IWF and presents a number of approaches for achieving the necessary functionality.

SIP at the Desktop - Intelligence to the Edge (Mitel)hot!

01.09.2001

The development of VoIP has been characterized by a perpetual battle to deliver the full-range of applications end users and service providers want, while balancing that with manageability and a straightforward design that eases deployment and development. One protocol that has fit that bill is the IETF's session initiation protocol (SIP).

SIP Residential Presentation (Cisco)hot!

01.12.2002

01.01.2003

Present enterprise communications systems and applications provide integration of voice and data services. Still, proprietary technology and architecture discrepancies make it difficult to implement and deploy new converged communications services. The Session Initiation Protocol (SIP) brings user centric Internet Telephony. This model provides new converged communications services based on presence, mobility and user preferences. SIP technology promotes distributed architecture models, and seamless integration with IP technology. SIP is an open extensible Voice over IP (VoIP) protocol and is a framework for building voice and data communication applications. This article presents what SIP brings to enterprise communication applications and how customers can manage a smooth transition to SIP based services with the example of the OmniPCXIP communication server.

SIP White Paper (Nortel Networks)hot!

01.02.2003

Services that consumers and enterprises are willing to pay for !

Session Initiation Protocol (SIP) and MCI AdvantageÂR White Paperhot!

01.06.2003

Global IP communications over the Internet is probably the most significant development since the emergence of telephone networks over 120 years ago. In this paper, we explore the new communication services enabled by the Internet, including examples of new and potential services.

Session border controllers (Acme Packet)hot!

07.07.2003

Regardless of opportunity, interactive communication over IP networks must be able to reach anyone, anywhere, anytime to maximize its value. To paraphrase Metcalfe's Law: the usefulÂ-ness, or utility, of interactive cormnunication equals the square of the number of users. New interactive communication services and applications, therefore, must ultimately span business and consumer, wired and wireless networks.

Consequently, simply building standalone voice, video and multimedia over IP network islands is not sufficient. They must be built and interconnected in a way that ensures security and peak performance end-to-end. Businesses and consumers will be satisfied with - and pay good money for - nothing less.

SIP Specifications and the Java™ Platformshot!

01.09.2003

The goal of this whitepaper is to identify the specifications to the Session Initiation Protocol (SIP)[1] defined through the Java Community ProcessSM (JCPSM) [2]. This document inspects each Java SIP specification describing the functionality, architecture, platform supported and how each interface relates to the other Java interfaces to SIP. This is not a tutorial on SIP or the Java language [3] and it is assumed that the reader has a reasonable understanding of both the Java language and the SIP protocol and their potential functions within an IP Communications network.

B2BUA: Enabling Class 5 Capabilities in SIP Designs (Radvision)hot!

17.09.2003

Enabling Class 5 Capabilities inSIP Design

Robustness testing of SIP implementations (Codenomicon)hot!

18.11.2003

Introduction

SIP[4] will be a part of future IP telephony infrastructure, raising new security concerns and issues. As past experience has shown, a majority of these problems are due to software vulnerabilities. One class of software vulnerabilities is introduced during implementation, in the coding process, due to non-robust handling of input data. An example listing of vulnerability types and failures is in Table 1.

One way to counter these vulnerabilities is to do white box testing and to perform code audits. This white paper discusses this process.

Enterprising with SIP - A Technology Overview (Avaya)hot!

02.02.2004

The vision that Avaya has for converged voice and data communications is to create a network environment that supports maximum enterprise efficiency. Session Initiation Protocol (SIP) [18] is a key technology for this evolution towards a converged communication architecture. SIP as an enabler of converged communication applications has been able to gain industry-wide acceptance by placing control of the communication across distributed networked entities and by providing a means of integration at various levels in the protocol stack. Such integration is now possible in a multi-vendor environment with multiple applications across a wide range of industry sectors. Converged communications that is driven by ubiquitous IP network connectivity defines the next stage of evolution in enterprise communications.

SIP is an application layer, peer-to-peer communication protocol that facilitates openness, simplicity, flexibility, and reuse in an "All IP" Architecture. This paper offers a look at how Avaya views SIP in enterprise evolution. It also describes SIP technology, elaborates on the role of SIP in realizing converged communications, and describes details of the SIP protocol and associated technologies.

Big Communications Picture (Siemens)hot!

02.02.2004

This white paper provides an overview of the companyâ_Ts HiPath portfolio, the focus being on HiPath OpenScape, which is a suite of presence-aware, real-time communications software. HiPath OpenScape is a groundbreaking addition to the HiPath solutions portfolio and an important development in its own right. Additional Siemens white papers are available that focus on the portfolio, the HiPath MobileOffice solution and the companyâ_Ts award-winning migration strategy.

SIP: Protocol Overview (Radvision)hot!

20.02.2004

The Session Initiation Protocol (SIP) is a signaling protocol for initiating, managing and terminating voice and video sessions across packet networks. SIP sessions involve one or more participants and can use unicast or multicast communication. Borrowing from ubiquitous Internet protocols, such as HTTP and SMTP, SIP is text-encoded and highly extensible. SIP may be extended to accommodate features and services such as call control services, mobility, interoperability with existing telephony systems, and more.

SIP is being developed by the SIP Working Group, within the Internet Engineering Task Force (IETF). The protocol is published as IETF RFC 2543 and currently has the status of a proposed standard.

This White Paper describes the key constituents of SIP.

White Paper on SIP Servers (RADVISION)hot!

05.04.2004

SIP Servers are essential network elements that enable SIP endpoints to exchange messages, register user location, and seamlessly move between networks. SIP Servers enable network operators to install routing and security policies, authenticate users and manage user locations.

SIP: The Next Step In Converged IP Communications (Cisco)hot!

30.06.2004

Session Initiation Protocol (SIP) builds on the IP communications foundation by providing a standards-based approach to enabling IP communications with numerous devices and applications. This paper describes the benefits of SIP to enterprise customers and explains the comprehensive CiscoÂR roadmap for delivering SIP-based solutionsâ_"an evolving strategy that helps deliver stronger IP communications benefits to enterprise customers today and in the future. Organizations that adopt Cisco solutions can reap the benefits of IP communications and establish a solid foundation to support new and emerging SIP networking technologies.