The Session Initiation Protocol (SIP) is a signalling protocol for Internet Telephony, multimedia conferencing, and instant messaging. The behavior of SIP platforms can be configured thanks to various programming interfaces. In this paper, we present a study of different existing SIP platforms. From this study, we identify key requirements that must be fulfilled by a SIP programming interface. ...

Modelling and Verification of Interworking between SIP and H.323 Ligang Wang Various standards organizations have considered signaling for voice and video over IP from different approaches. There are currently two standards for signaling and control of Internet telephone calls, namely ITU-T Recommendation H.323 and the IETF Session Initiation Protocol (SIP). H.323 is an umbrella standard that p...

DNA Stable isotope probing (DNA-SIP) is a powerful method that links identity to function within microbial communities. The combination of DNA-SIP with multiplexed high throughput DNA sequencing enables simultaneous mapping of in situ assimilation dynamics for thousands of microbial taxonomic units. Hence, high throughput sequencing enabled SIP has enormous potential to reveal patterns of carbo...

In the session initiation protocol (SIP), payments have been proposed as a way for vendors to obtain profit from the services they provide. Payments in SIP have also been proposed for microbilling and even as a solution to SPAM in VoIP systems. Although several proposals exist for making payments in SIP, they present some limitations when we want to pay for access to real-time services: either ...

This document explores an ambiguity in the interpretation of the element of the Presence Information Data Format for Location Objects (PIDF-LO) in cases where PIDF-LO is conveyed by the Session Initiation Protocol (SIP). It provides recommendations for how the SIP location conveyance mechanism should adapt to this ambiguity. Documents standardizing the SIP location conv...

The Session Initiation Protocol (SIP) is commonly used to establish Voice over IP (VoIP) calls. Mostly recently, Yoon et al. proposed a new secure and efficient SIP authentication scheme in a converged VoIP network based on ECC. In this paper, we first demonstrate that the recently proposed SIP authentication scheme is insecure against off-line password guessing attacks. Thereafter, we propose ...

Es wird eine Vorgehensmethodik für eine strategische Informatikplanung (SIP) beschrieben, die in der Schweiz von der Bundesverwaltung als Grundlage für die strategische Informatikplanung in allen Departementen und Verwaltungseinheiten vorgegeben ist [SIP-Bund 2003]. Die betrachtete Methode orientiert sich im Wesentlichen an folgenden Grundsätzen: ❏ Informatik ist ein Werkzeug von strategischer ...

The steady improvements in the networking infrastructure and ever increasing broadband penetration has fueled the resurgence of voice-over-IP (VoIP). One of the important contributors to this growth has also been the development and wide acceptance of the session initiation protocol (SIP). However, the current usage of SIP requires a per-application deployment (each application using its own SI...

The popularity of gateways that interwork between the PSTN (Public Switched Telephone Network) and SIP networks has motivated the publication of a set of common practices that can assure consistent behavior across implementations. This document taxonomizes the uses of PSTN-SIP gateways, provides uses cases, and identifies mechanisms necessary for interworking. The mechanisms detail how SIP prov...

The objectives of this study were to investigate the immune enhancement activity of the Sarcodon imbricatus polysaccharide (SIP). In this study, water extraction method was employed to isolate polysaccharides from the Sarcodon imbricatus. The immunoloregulation effects of SIP were evaluated with models of cyclophosphamideinduced mouse immunosuppression. The immunoloregulation activities of SIP ...