TELE-X - a Satellite System for TV and Data Communication ...

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The central software consists of a number of program modules, each of which handles one or several functions. Modules have been developed for, among others: - Operating system - Loading - Control program - Fault handling - Statistics Fig. 3 LPB 110 System structure LPB 110 consists of hardware and software, and is controlled by microprocessors, fig. 3. The system has a modular structure both as regards functions and capacity, which means that new functions can easily be added. The software is stored in RAMs which are loaded from floppy disc units. The use of RAM makes the system very flexible. When programs are updated new floppy discs are sent to the users. CPU contains administrative routines, statistics and I/O functions. Slave processors are used to relieve CPU of certain scanning routines in the interface hardware. LPB110 consists of a central part, one or more application parts and an I/O part, fig. 4. Central part The central part in LPB 110, fig. 5, is a computer system developed by Ericsson, APN167, which has a Motorola 68000 as CPU. The programming language is a high-level language. ERIPAS- CAL, which is a Pascal language adapted for real-time app I i cat ion. In addition a control language has been developed with which the users of LPB 110 can program their own test sequences. The execution of test sequences controls the I/O The I/O units in LPB 110 are portable typewriters, and two floppy disc storage units for 51/4" discs, fig. 6. Interworking with the AXE 10 system takes place via a signalling interface (CCITTV.24). The I/O system of the AXE 10 exchange can therefore be used to communicate with LPB 110. All program modules are stored on floppy discs, and they are automatically read into LPB 110 when the system is started up. A built-in editor enables the user to design new control programs or modify the supplied programs. Application part Special hardware and software has been designed for use in LPB 110 as interface to different signalling systems. An interface can be used for more than one signalling system. For example, the same interface module is used for both CCITTR1 and R2, fig.7. The hardware can be controlled via one of two buses, either the I/O bus of APN 167, which is used in new designs, or the EM bus in AXE 10 via a specially developed bus interface. When the EM bus is used LPB 110 can utilize the hardware in AXE 10 (for example the signal ling terminal for CCITT signalling system no. 7). Each hardware interface has a diagnostic program, which monitors the connected hardware and initiates a printout if a fault should occur. The faulty board can then be changed. Traffic functions In LPB 110 each test object is considered as a control individual, for example
35 The control individuals are divided into groups, test batches, which are processed together as regards statistics, fault handling, start and stop. The control individuals are allocated to a batch by means of commands. Fig. 5 LPB 110, central part FCS File control system CPEM Control program, editor module CPAM Control program, analysis module CREM Command read file execution module LOAM Control program, loading module DDHM Device driver handler module CONM Test control module LINM Linking module INIM Traffic initiating module STAM Statistics module FAUM Fault handling module EXCM AX exchange module ERIOS Ericsson operational system COMANA Command analysis module programs and data are associated with each control individual. However, the control programs are common for a number of control individuals. Each type of signalling has its own control program. The data are specific for each control individual, and vary depending on the type of connection the individual represents. For example, the data for a local subscriber line include: - type of subscriber (A or B) - subscriber number - type of dialling tone - type of ringing control tone - type of control program. Within a test batch originating and terminating control individuals can during traffic be linked either permanently or dynamically. Permanent linking means that the control individuals to be linked are specified in a table, which is set up by means of commands. Several different tables can be set up and used in a given order during the traffic processing. Dynamic linking means that the control individuals are linked together at random. Atest batch can include control individuals which belong to several different signalling systems. Traffic volume The traffic volume can be regulated as follows: - Even, given by a command - Poisson distribution - As much traffic as the connected lines permit (no traffic regulation). In each case the number of simultaneous calls can be preset. The total number of calls in a test batch is specified by means of a command. Fig. 7 LPB 110, application part EMBA EM bus adaptation unit EMHA EM bus handler module SLI Subscriber line interface CCITT 7 Junction lines with CCITT nr 7 signalling DRIM-LSLI Device driver module for local lines DRIM-7 Device driver module for CCITT 7 signalling DRIM-CALS Device driver module for MFC signalling
Page 1: ERICSSON REVIEW Integrated Maintena
Page 5 and 6: ERICSSON REVIEW Number 1 1983 Volum
Page 7 and 8: The unique facility of a satellite
Page 9 and 10: Technical data for a station Antenn
Page 11 and 12: Technical data for the feeder link
Page 13 and 14: 9 Fig. 7 Mixer and preamplifier The
Page 15 and 16: MATS ENEBORG Fibre Optics and Line
Page 17 and 18: 13 Fig. 6 The structure of system Z
Page 19 and 20: 15 Fig. 9 Part of the junction netw
Page 21 and 22: Fig. 11 Part of an urban and trunk
Page 23 and 24: 19 MATS ENEBORG BJORN JOHANSEN Depa
Page 25 and 26: Fig. 6 An example of a printout of
Page 27 and 28: Technical data for ZAN 101 Maximum
Page 29 and 30: Fig. 14 The Transmission maintenanc
Page 31 and 32: 27 BJORN LENGQUIST PER AKE WIBERG E
Page 33 and 34: 29 Supervision of the digital inter
Page 35 and 36: 31 ules can be used to successively
Page 37: BENGTJANSSON KENT JOHANSSON TOMMY O
Page 41 and 42: 37 Fig. 10 LPB 110 used in an AXE 1
Page 43 and 44: 39 BENGT LAGERSTEDT Public Telecomm
Page 45 and 46: 41 Fig. 6 With multiplexer ZAH 1.5/
Page 47 and 48: Fig. 10 In this example of the use
Page 49 and 50: 45 HARALD BRANDT ALEKSANDER MARLEVI
Page 51 and 52: 47 Fig. 5 Stored program controlled
Page 53 and 54: 49 quency jumps and no transmission
Page 55 and 56: Hotel Communication System Robert D
Page 57 and 58: 53 Fig. 3 The answer telephones at
Page 59 and 60: 55 The capacity of the hotel PABX i
Page 61 and 62: 57 Fig. 7 The hotel computer, Erics
Page 63 and 64: Hardening of Telecommunication Netw
Page 65 and 66: Fig. 3 The electrical and magnetic
Page 67 and 68: 63 Rise Duration time Time Fig. 7 D
Page 69 and 70: 65 Component Microwave diodes Digit
Page 71 and 72: 67 electrical safety regulations, a
Page 74: ERICSSON ISSN 0014-0171 Telefonakti

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