1. - ericssonhistory.com

More documents

Recommendations

Info

Fuse NGH 22In conjunction with the redesign of the connecting and protector strips thefuses have also been modified to some extent, the end caps now being madeof thin brass sheet instead of being turned out of bar stock as earlier. Theyhave also been flanged to prevent the fuse from slipping in its holder. The newfuses are designated NGH 22 and replace the former type NGH 20.InstallationThe new connecting and protector strips can be fitted to main frames BAB12—14 and other types. The frame need only be equipped with a simplefixing bar holed to take the new strips. Fitting of the fixing bar can be donewithout difficulty while the main frame is in service. If old type protectorstrips are replaced by new types, the cables must be reformed. If the stripsare supplied complete with mounting they are numbered as in the table below.Protector mountings, 10-pair strips and protector elements are packedseparately for shipment. The mountings should be erected in the frame first.The switchboard cable should then be formed as shown in fig. 8. The 10-pairstrips, from which the inside terminal blocks are removed, can thereafter bescrewed into position and the cable connected as in fig. 9. As seen in thephotograph, the fanning strips on the protector mounting are so constructedthat the formed cable need not be threaded but can be laid directly intoposition.Fig. 8X6978Table 2Cable, 50-pair, readyformedCode no.CapacitypairsConsisting10- jair stripsNumber Code no.ofProtectormountingNEL 1101NEL 1102NEL 1105102050125NEL 1100» »» »479079479080475155NFL 3131NFL 3132NFL 3135102050125NFL 3101» »» »479079479080475155NFL 3141NFL 3142NFL 3145102050125NFL 3111» »» »479079479080475155NFL 3231NFL 3232NFL 3235102050125NFL 3201» »» »479079479080475155NFL 3241NFL 3242NFL 3245102050125NFL 3211» »» »479079479080475155Fig. 9 X 2151Protector strip with cable ready soldered18
Visual Staff Locator System for Small andMedium-sized OfficesO IRGENS, TELEFONAKTIEBOLAGET LM ERICSSON, STOCKHOLMU.D.C. 654.938L M Ericsson's keyset operated staff locator system with facilities for paging100, or alternatively, 200 persons was described in Ericsson Review No. I,1954. So large a number of signals is seldom needed in small and mediumsizedoffices, and L M Ericsson has therefore introduced the similar, butsmaller system presented in this article.An important part of customer service is a well managed telephoneswitchboard. Customers tend to judge the whole efficiency of an organizationby the speed and confidence inspired by the switchboard operator. Whatthe customer notices is how long he has to wait for connection to the personhe wants to speak to. To be kept waiting merely irritates him—and on longdistance calls costs him money as well. Any firm that wants to show goodcustomer service must make sure that telephone delay is cut to a minimum.A common reason for telephone hold-ups is that some people, naturally,are kept on the move from one department to another. When the operatorfails to get a person on his normal extension, she tries to trace him in otherparts of the building and put the call through to him there. The quicker sheis able to contact him, the less time will the caller have to wait. An invaluableaid in this respect is a staff locator system.General PrinciplesA staff locator system should meet the following requirements:The operator must be able to send signals from the switchboard tovarious points in the building.Individual and easily recognizable signals must be allocatable to allpersons whom the operator regularly needs to contact.The signals must not be disturbing to persons at their normal placeof work.The manipulations required of the switchboard operator must besimple, and the signal must continue to be displayed until the soughtparty answers by telephone or by other means, or until the operatorcancels it.L M Ericsson's keyset operated, sequence paging system, described inEricsson Review No. 1. 1954, meets these requirements to the full. Systemsof this kind are mainly adapted to large organizations, and L M Ericsson hastherefore introduced a similar smaller system comprising 31 signals withalternative steady or flashing light, so allowing in fact for 62 separate signals.19
Page 3 and 4: ERICSSON REVIEWVol. XXXIV 1957RESPO
Page 5 and 6: ERICSSON REVIEWVol. XXXIV No. 1 195
Page 7 and 8: ularities serious enough to affect
Page 9 and 10: Faults at Centrum Jan.—June 1956.
Page 11 and 12: The same practice is adopted at the
Page 13 and 14: Mechanization of the Aland Telephon
Page 15 and 16: The quality of cable construction w
Page 17 and 18: exchange, while another has perhaps
Page 19 and 20: Fig. 2 X 6975IO-pair strips(From le
Page 21: •G rLrlFig. 6The combined fuse NG
Page 25 and 26: Fig. 4 x 8008Keyset KEM 3294placed
Page 27 and 28: Traffic Signals at Vasterbron, Stoc
Page 29 and 30: Three Programme Vehicle ControlThe
Page 31 and 32: x 8009 Ordinary vehicle control imp
Page 33 and 34: TownExchangeNumberof linesTownExcha
Page 35 and 36: NEWS/romAll Quarters of the WorldL
Page 37 and 38: L M Ericsson, Midsommarkransen, isa
Page 39 and 40: 3056 .(487ricss\nUQ;Jao0-V5roc0-ft

1. - ericssonhistory.com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?