The architecture and functioning of OCB-283: The switching node in the Alcatel 1000E

Type :

Term papers

Pages :

20 pages

Format :

.doc

Published date :

05/27/2009

Category :

Science & technology

Sub category :

Electronics

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Summary :

Preface
Introduction
Salient features of the system
Main technical choices
1. Hardware
2. Software
Exchange function architecture
1. Suscriber access subsystem
2. Control and connection is the block consisting
Subscriber access system
1. Connection of CSN with the exchange
2. Centrex function
Connection and control
1. Overview of the connection
2. Control
3. Switching
4. Connection of PCM links and auxiliary equipments
Hardware of the connection and control subsystem
1. Auxiliary equipment control station (SMA)
2. Main control station (SMC)
3. Auxiliary equipment control station (SMA)
4. The SMA contains the following two functional units
5. Trunk control station (SMT)
Operation and maintationance
1. Operation of the telephone application
2. Circuit and subscriber line tests
3. Management of fourth order cyclic redundancy code (CRC4)
4. Frame management
5. Operation and maintenance of the system:
Service provided
System applications
Facilities for analogue subscribers on a fixed network (non-exhaustive list)
Facilities of the digital subscibers on a fixed network
Schematic representation
Conclusion

Abstract

This document relates to the O.C.B 283 system, switching node in the alcatel 1000e 10 switching system. It outlines the general architecture and operation of the O.C.B.283, both the fixed subscriber centers and the access exchange to services (G.S.M, IN). O.C.B.283 is digital switching system which supports a variety of communication needs like basic telephony, I.S.D.N., interface to mobile communication, data communication etc. The system has been developed by CIT alcatel of France and therefore has many similarities when compared to its predecessor, the E10B.The alcatel 10000 E10 system provides great flexibility to serve all types of subscribers, in urban or rural areas. The shelf which accommodates subscriber line cards is known as the Concentrator and can either be co-located, in which case they, are known as Concentrators, or they can be co -located with digital control units in which case they are known as local concentrators or at a remote location in which case they are known as remote concentrates. The CSN is connected to the exchange via standard PCM links or via matrix links (LR) if it is local. It communicates with the E10 (ocb283) using the N0 7 signaling system. If links are accidentally disconnected from their local exchange, the CSN can switch to stand alone operation, which means that calla can be setup between the subscribers connected to it.