This paper introduces IP gateway, SIP(Session Initiation Protocol) and H.248 protocol, and gives the resolution of Internet Phone gateway supporting H.248 and SIP protocol on the base of H.323 protocol stack.
Firstly the paper narrates the relationship between SIP(Session Initiation Protocol) server and Parlay gateway,then the function model of SIP protocol mapping is described,lastly solutions for the key technologies to realize the SIP protocol mapping are proposed,which include the implementation of SIP server,Parlay/SIP parameter encoding and decoding,call object identification mapping etc.
The thermodynamic functions of liquid Si-P alloys are approximated using the model of ideal associated solutions with two associates SiP and Si2P.
A novel europium(III) coordination polymer [Eu(Sip)(H2O)5]n · nH2O · 1.5n(Bipy) (I) (Sip is 5-sulfo-isophthalate trivalent anion and Bipy is 4,4'-bipyridine) is hydrothermally synthesized and determined by the single crystal X-ray diffraction method.
In I, each Eu3+ ion is coordinated by four oxygen atoms from two carboxylate groups of two different Sip anions and five oxygen atoms from five coordinated water molecules to complete a deformed monocap square antiprism.
Moreover, each Sip anion acts as a tetradentate ligand to connect two adjacent Eu3+ ions through its two chelating carboxylate groups, resulting in one-dimensional linear chains.
The previously described gene sip1 belongs to transcription factors of the zinc finger family.
Based on the study of SIP,the paper presents the overlay method to implement the mapping between SIP protocol state machine and IN call state model BCSM,and analyses the implementation concretely.The method has resolved the key technology in interworking of Internet and IN.
Through the analysis on H.323 protocol family and SIP protocol,proposed a model of interworking between H.323 and SIP.And the conception of protocol translation gateway is also introduced in this paper.
A Java based approach for implementing SIP (Session Initiation Protocol) stack is presented in the paper. A layered SW architecture, 2 stage concurrency and synchronization mechanisms are introduced. SIP's application in PINT is also discussed.