A Distributed Intelligent Computerffelephony Network Integration Architecture for Unified Media Communication Plamen L. Simeonov+, Peter Hofmann- +Siemens AG: Plamen.Simeonov@sietec.de -Technical University Berlin, FSP·PVIPRZ: peterh@prz.tu·berlin.de Abstract· This paper presents a distributed IN ar· chit ecture called @INGGle lIL 11), that elaborates a Unified Media Communications Senice (UMCS) pro- viding both messqlng and telephony services between drcuit switching and packet networkl. It represents an InterWorking Unit (IWU) in CTI networks aUow. ing the user access to a Unilled Message Store-Une (UMSL) via traditional PSTNIISDN equipment such as telephones and rax machines on the one side and networked computers equipped with mail readers and Web browsers on the other side to enable both on· line and off·Une communication. The core or this new architecture Is the Network· Bridge Service Node (NBoSN), a distributed Intelligent network (IN) element consisting or a Channel Matrix Switch (CMS) to connect to the PSTNnSDN, several Ressourc:e Platforms (RP) containing Media Conver· sion Processors (M CP) to perform the media transla· tion In the required Interchange rormats, an Internet Gateway (IG) to hold the subscribers' mailboxes and provide the Internet connectivity, and a Service Node ControUer (SNC) to manage the overall service logic: and the above NB·SN components. The Senic:e Node itselrls managed along with other nodes in a distribut· ed IN by .. TMN-c:ompUant Operation, Administra· tion and Maintenance (OAM) center. The @INGatesystem was Jolnlly developed by SIe- mens AG and the Technical University Berlin. Keywords: CTI, IWU, PSTNnntemet.Gateway I. Introduction The @INGate project designed an InterWorking !SUP (Q.7Il.7") Unit (IWU) between ISDNIPSTN (TE2) and Inter· net Terminals (IT). cf. fig. I, (3). which hosts age· neric Unified Media Communication Service (UMCS). This architecture addresses three basic el· ements: -protected network links: Channel Matrix Switch (CMS) facing PSTNIISDN (incl. con· nections to mobile radio networks) and Inter· net Gateway (IG); -ellhanced media contents: Resource Platforms (RP) using Media Conversion Processors (MCP); -reliable service and resource control: Service Node Controller (SNC). II. @INGate Rererence Model The @INGate Reference Model contains the fol· lowing network elements (cr. fig. 2): -Network·Bridge Service Node (NB·SN) -Service Data Server (SDS) -Operation, Administration and Maintenance Center (OAMC) -WWWServer -Firewall The Network·Bridge Service Node (NB·SN) con· sists of the following modules: -Service Node Controller (SNC) -Resource Platforms (RP) -Media Conversion Processors (MCP) -Channel Matrix Switch (CMS) replIP (ARP) Fig. I @INGateas IWU Intelligent Networks and Intelligence in Networks D. Gaiti (Ed.) Published by Chapman &: Hall OI997IFlP