Frame Relay - for Faster and More Efficient Data Communications ...

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16Fig. 6Cable attenuation test at Ericsson's Fibroco factoryin SpainAfter the secondary coating has been applied,the fibre is subjected to quality inspection(secondary testing). This test iscarried out according to the same routinesas those applied in the primary OTDR test.The test data is usually stored directly inthe database.Terminals at the stranding lines registerthe fibre contents of each cable, and thecable is given a unique identification number— a cableid. The cable line operatorsalso handle the registration of cables. Tofacilitate work and minimise the risk of incorrectregistration, all terminals have abar code reader and a bar-code menu.Stranding is followed by intermediate testing,jacketing and delivery inspection.Intermediate testing comprises attenuationmeasurements of all fibres in thecable. The test data is stored in the database.The values obtained in these testsand in secondary attenuation tests arechecked against the primary attenuationvalues. The program issues a warning ifthe difference exceeds the tolerancesspecified.Delivery inspectionA cable which has passed the delivery inspectionis ready for delivery. A deliveryrecord for the customer is printed on a laserprinter.The delivery record documents the opticaland physical parameters of the cable, Fig.7. Since a cable may contain hundreds offibres, the delivery record will take up atleast two size-A4 pages. The first pagecontains statistical data, and the subsequentpages give test data of each individualfibre.The layout of the delivery record will vary,depending on the customer's requirementsand on the type of cable delivered.To rationalise handling, customers may receivecable parameters stored on diskette.StatisticsTwo main system requirements were definedwhen Dehlfi was put into service inApril, 1988: Automatic transfer of test datafrom test stations to the database, andprintout of complete delivery records. Duringthe subsequent development of theDehlfi system, a large number of quality inspectionparameters have been added,and the possibilities of using these parametersin quality work have also increased.Three program categories are available forthe processing of data extracted from thedatabase:- Search, processing and presentationComplete reports for recurrent follow-upare prepared- Search and processingData is prepared for presentation bymeans of a special graphicsprogram, e.g. Graph-in-the-Box- SearchRoutines which only locate predetermineddata for processing and presentationlater on by means of statistics software,e.g. Minitab.Minitab is a software package for advancedstatistical processing. EQFOS(Ericsson Quality, Design and StatisticalAnalysis of Experiments) is one of its users.Graph-in-the-Box is a very handygraphics program which also contains somestatistics functions.The software packages developed byEricsson Cable's own specialists includeone for collecting fibre data during a pre-ERICSSON REVIEW No. 1-2, 1992
VK 1523-402033CERICSSON CABLESRECORD OPTICAL CABLEPrepared I Date Order no:HL/ECA/T/VK Margit Dahlberg 17 Dec 91 29595-080Approved [ Checked Manufacture no: ' KB no:| S40E00700 7779Cable : GNLWLV 24x10/125 EM Length ordered. . : 4000tested. . . : 3978Fibre : OVD/Q shipped. .: 3973Cable id.. . : 9035007 Customer :Drum no....: 3483 order..: KI 199-6755spec no:SPECIFIED VALUES [ TEST VALUES| mean | min | maxMode field diam P1I 9.4 ± 0.8 Jim 9.2 9.6H _ Cladding diam 125 ± 3 Jim 124 126J I Concentricity error ^ 1.0 iim 0.32BBI " Cladding non circ
Page 1: ERICSSONREVIEW1-21992Frame Relay -
Page 4 and 5: ERICSSON REVIEWBO HEDFORSPublisher
Page 6 and 7: 4Fig. 2Distributed computer environ
Page 8 and 9: Fig. 7A company's data network shou
Page 10 and 11: 8Fig. 11The frame format used for F
Page 12 and 13: 10er (DE, Fig. 12) should be set to
Page 14 and 15: Computerised System for QualityInsp
Page 16 and 17: Box 1Code39, the first alphanumeric
Page 20 and 21: 18Fig. 9Installing the Dehlfi syste
Page 22 and 23: Human Factors - A Key to ImprovedQu
Page 24 and 25: 221 Use the user's model2 Introduce
Page 26 and 27: 24Fig. 5Advanced Human Factors desi
Page 28 and 29: Fig. 7User interface for PBX attend
Page 30 and 31: Cell-voltage EqualisersSeries BMP 1
Page 32 and 33: 30Box1CELL-VOLTAGE EQUALISER BMP 16
Page 34 and 35: 32age, the faulty cell or the entir
Page 36 and 37: In Search of Managed ObjectsWalter
Page 38 and 39: Fig. 4The telecommunication network
Page 40 and 41: Fig. 6Functional Model illustrating
Page 42 and 43: 40Fig. 9Combination of layering and
Page 44 and 45: 42Table 2Relationship between Funct
Page 46 and 47: 44No1PPI2PPI3SLTTransport Function(
Page 48 and 49: 46Table 4SDH functions, Resources a
Page 50 and 51: The Managed Objects and their prope
Page 52 and 53: 50Fig. 21Information Model of PDH d
Page 54 and 55: Fig. 25Information Model of SDH mul
Page 56 and 57: 54Table 5Cross-connect functions, R
Page 58: Fig. 32, leftCross-connect Fragment

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