ISDN Introductory

Overview This course on ISDN is designed for those who need to understand the principles and practices of ISDN. Duration - 2 Days.

Who will benefit

Especially suited for people who interface with customers on the implementation, maintenance and technical support of ISDN.

Prerequisites

None.

By the end of the course delegates will be able to describe:

By the end of the course delegates will be able to describe: • The general operation of the ISDN within a telecommunications network • Various bearer services, teleservices and supplementary services • The structure of the ITU ISDN I-Series recommendations • The different Network Terminating Equipment • The structure of the ISDN 3 Layer Reference Model • The ISDN physical & electrical interfaces (Layer 1) • Functions and structure of the S/T Bus • Functions of the data link protocols (layer 2) • The different types of Layer 2 frames and describe their uses • The network call control functions & protocols (Layer 3) • The fields of Q.931 message and detail the functions and options • Analyse a simple call trace.

Course Content

An Overview of ISDN The purpose of ISDN and the IDN network. Digital transmission components of speech, Pulse code modulation (PCM), ADPCM, Transmission terms. E1 framing structure, Channel associated signalling, Common channel signalling, ISDN Definition, The Integrated Digital Network (IDN), Definition of the two types of ISDN access: Basic rate, and Primary rate. Channel types within ISDN; B channels, D channels, and H channels. Inverse Multiplexing. ISDN Interfaces and Devices Customer Premise Equipment (CPE), Physical reference configuration examples, The Basic Rate "T" interface, the "S" interface, A typical existing user, Maximising network connections, Basic rate interfaces, PABX Basic Rate Interface, Primary Rate Interfaces, and Functional devices, Network Termination 1(NT1), Terminal Equipment. The BRI U connection, the BRI S/T connection. Point to point, point to multi-point. The ISDN Protocol The Adaptation layers - AAL. The service classes. AALs 1 through 5. Signalling and control. Set up and clearing messages. Information elements. Connection types ATM addressing. Public and private addresses. Address registration-using ILMI. Multipoint signalling. Structured cabling, Generic cabling, The S/T bus line code - Alternate Mark Inversion (AMI), S/T reference point layer 1 frame structure, Layer 1 bus for I.430 and I.431 access, D channel access, Multiple access/ D channel contention resolution, Activation/de-activation, The U interface access coding, External line codes (2B1Q, 3B2T, 4B3T, etc.) Echo cancellation, physical and electrical connection, Modes of operation and wiring configurations, Point-to-point. The ISDN Protocol Short passive bus, Extended passive bus, "Y" configuration, Star configuration, The 3 ISDN layers, Frame structure, Layer 2 protocol exchange, Compelled signalling, Layer 2 error control, Invalid send sequence, Multiple terminal installations, Service Access Point identity (SAPI), Terminal End-point Identifier (TEI), TEI assignment procedures, Unnumbered frame types, Information frame types, Supervisory frame types, Call set-up example, ISDN and X.25, LAPD and LAPB, New ISDN frame mode services, Frame Relay, Broadband ISDN (B-ISDN), Asynchronous Transfer Mode (ATM) Q.931 Message Structure Protocol discrimination, Call referencing, Q.931 message types and values, ISDN number format, Information elements and their uses, Cause values, Bearer services and their application, Teleservices values and their uses, Supplementary services, Call set-up messaging and mapping to SS7. Supplementary Services Supplementary Services, (e.g. DDI, MSN, CLIP, etc.), Call offering services (e.g. call transfer, call forwarding, etc.), Call completion services (e.g. call waiting), Multiparty services (e.g. conference call), Community of interest services (e.g. closed user group), Charging services (e.g. credit card call), Additional services (e.g. user-to-user signalling). Appendix A - Q.931 Call trace