Manuel D’UtilisationTable des matièresTable of Contents3ABOUT THIS DOCUMENT17PREREQUISITE SKILLS AND KNOWLEDGE17DOCUMENT ORGANIZATION17HOW TO MAKE COMMENTS ABOUT THIS DOCUMENT191. INTRODUCTION TO CONNECTIVITY21TRANSMISSION TYPES23ANALOG TRANSMISSION23DIGITAL TRANSMISSION23ANALOG VS. DIGITAL25TRANSMISSION STATES27VOICE TRANSMISSION27Entering the Switch27Exiting the Switch29DATA TRANSMISSION31Protocol Layers31Protocols Used33Protocol States34Connectivity Rules35MULTIPLEXED COMMUNICATION37TYPES OF MULTIPLEXING37Frequency-Division Multiplexing37Time-Division Multiplexing37Statistical Multiplexing38MULTIPLEXING OVER DS1 FACILITIES38Line Coding39Signal Inversion41Framing44Signaling45MULTIPLEXING OUTSIDE THE SWITCH49Multiplexing onto T1 Trunks49Compressing the Signal51Altering Channel Assignments on T1 Trunks51Getting the Signal Ready for the Central Office51Changing the Transmission Medium from Metallic to Fiber-Optic52Multiplexing with Microwave52Demultiplexing52STATISTICAL MULTIPLEXING54TRUNKING55APPLICATION55Local Exchange Trunks55Tie Trunks56Special-Access Trunks57Auxiliary Trunks57Miscellaneous Trunks57CONNECTIVITY58ADMINISTRATION OPTIONS59System 85/G2 Administration59System 75/G1 Administration61DS1 Options61INTERFACE CIRCUIT62TRUNK TABLES622. COMMUNICATION SYSTEM NETWORKING (em AN OVERVIEW73TYPES OF NETWORKS74NETWORK EVOLUTION75SOFTWARE CAPABILITIES76Basic Networking Software76Main-Satellite/Tributary Software (em The UDP and Multipremises Packages77Electronic Tandem Network Software (em The PNA and ETN (Standard Network) Packages78Distributed Communications System79NETWORK CALL PROCESSING79Internal Dial Plan80Auxiliary Call Information82Automatic Alternate Routing83Automatic Route Selection86NETWORK ADMINISTRATION89PRIVATE NETWORK TRUNKS89NETWORKING FEATURE PARAMETERS893. TANDEM TIE TRUNK NETWORKS93INTERACTIONS WITH OTHER NETWORKS934. MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES95MS/T CONFIGURATIONS96Main-Satellite Configuration96Main-Tributary Configuration97MS/T FEATURES98Routing Incoming Calls101Routing Outgoing Calls101Other Routing Capabilities102ENGINEERING CONSIDERATIONS102INTERACTIONS1035. ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES105ETN CONFIGURATIONS105ETN TRUNKS106Access and Bypass Access Tie Trunks108Off-Net Trunks109FEATURES109Uniform Numbering Plan109Automatic Alternate Routing111Automatic Route Selection111ETN INTERACTIONS WITH OTHER NETWORKS111Extension Number Portability Clusters112Software-Defined Network113Release Link Trunk Networks - CAS and ACD116Distributed Communications System Clusters118Main-Satellite/Tributary Networks118ENGINEERING CONSIDERATIONS1186. DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)119DCS CLUSTERS120DCS LINKS120Tie Trunks121Signaling Links121DCS SIGNALING LINK CONNECTIONS126System 75 or Generic 1 (G1) to System 75 or G1126System 85 or Generic 2 (G2) to System 85 or G2128System 75 or Generic 1 (G1) to System 85 or Generic 2 (G2)130DIMENSION Signaling Links132TRANSPARENT FEATURES132Transparent Attendant Features132Transparent Voice Terminal Features135Audio Information Exchange (AUDIX) Features Transparency137ENGINEERING CONSIDERATIONS139ADMINISTRATION CONSIDERATIONS1417. DATA CONNECTIVITY - AN OVERVIEW143DATA COMMUNICATIONS VARIABLES144Communications Protocols144Analog vs. Digital146Synchronous vs. Asynchronous146Simplex vs. Half-Duplex vs. Full-Duplex147Parallel vs. Serial148Transmission Speed148Type of Communications Channel149SPECIAL DATA FEATURES151Terminal Dialing151Data Call Setup From a Voice Terminal152Computer Dialing152Data Hot Line152Data Protection153Data Privacy153Data Restriction153Data Only Off-Premises Extension1538. DATA COMMUNICATIONS CAPABILITIES155DTE CONNECTIONS157DTE COMPATABILITY157Protocol Converters157Terminal Emulators158PC/PBX or PC/ISDN158DCE POSSIBILITIES159Data Modules159ADUs160Modems160DATA MODULE CHARACTERISTICS160MODEM POOLING CONNECTIONS164LOCAL AREA NETWORK CONNECTIONS167LAN TOPOLOGY167LAN PROTOCOL167LAN TRANSMISSION MEDIA168LAN CONNECTORS168ADVANTAGES OF A COMMUNICATIONS SYSTEM IN A LAN ENVIRONMENT168Communication Between the LAN and Outside DTEs169Communication Between the LAN and Other Networks172The Communication System as a LAN Backup174PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS175PUBLIC DATA NETWORKS175Packet-Switched Public Data Networks175Circuit-Switched Public Data Networks176PRIVATE DATA NETWORKS180Terrestrial Private Data Network Links180Satellite Private Data Network Links184TELEMARKETING HOST CONNECTIONS185THE ISDN GATEWAY185THE INTEGRATED TELEMARKETING GATEWAY185DATA NETWORK ADMINISTRATION1899. DATA COMMUNICATIONS CONFIGURATIONS191DSC AND PSC CONNECTIONS192SNA NODE CONNECTIONS195CONNECTIONS THROUGH PUBLIC OR PRIVATE DATA NETWORKS196File Transfers196Video Teleconferencing196Image Processing197FAX Transmittal197A. RELATED DOCUMENTS199B. SYNCHRONIZATION OF DIGITAL FACILITIES209THE NEED FOR SYNCHRONIZATION209SYNCHRONIZATION HIERARCHY211CHANGES TO THE SCS SOFTWARE MADE AVAILABLE VIA SOFTWARE PATCHES219NETWORK SYNCHRONIZATION AND ENGIINEERING226AVAILABILITY OF SYNCHRONIZATION SOURCES236CONCLUSIONS ON SYNCHRONIZATION237USE OF GENERIC 2 AS A SYSTEM CLOCK REFERENCE237USE OF GENERIC 1 AS A SYSTEM CLOCK REFERENCE238C. TRUNKING TERMS AND CAPABILITIES241D. COMMUNICATIONS PROTOCOLS273OSI MODEL274STANDARD PROTOCOLS277AT&T PROTOCOLS282E. LEAD DEFINITIONS293F. NETWORKING FEATURES - AVAILABILITY MATRIX301ABBREVIATIONS307GLOSSARY313INDEX337Taille: 1,7 MoPages: 348Language: EnglishOuvrir le manuel