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

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16 Fig. 10 Part of an urban and trunk network in which the transmission maintenance is carried out using AXE 10, AOM 101 and ZAN 101 nals are transmitted over the service channel of the link. The fault location channels are regenerated in a modem regenerator magazine, MRM, which makes it possible to locate faults in transmission equipment between, for example, RSM and RSS. Alarms from radio relay link terminals are handled in the same manner as alarms from other transmission terminals. However, at present radio relay link alarms are not standardized in the same way as alarms from line terminals. Transmission maintenance of trunk and junction networks A characteristic feature of such networks is that alarms relating to one and the same link are always collected by two different AXE 10 exchanges. The example in fig. 9 shows two exchanges with trunk and junction networks. The fault location takes place from an AOM 101 work station and the following routines are used: - alarms from ETs in local exchanges and the transit exchange are transmitted via a data I ink between AXE 10 and AOM 101 - alarms from LTs and bit error rate values from regenerators are collected with the aid of ZAN 101. In a network containing local, junction and trunk networks, fig. 10, the fault location is usually carried out from AOM 101 work stations. One station is then placed adjacent to the central AOM 101 equipment, and the others in AXE 10 local exchanges. Centralized transmission maintenance can be carried out from any AOM 101 work station. In addition the maintenance of each individual local network can be centralized to an AXE 10 work station, with optional connection to the AOM 101 system. In this case the fault location pair of the local network is reached via FLM, which forms part of ZAN 201, and without any assistance fromAOM101 or ZAN 101. This makes it possible to retain transmission maintenance even if faults should occur in AOM101 orZAN101. Centralized fault location is possible even without AOM 101 and ZAN 101, with the aid of ZAN 201, fig 11 A trans-
Fig. 11 Part of an urban and trunk network in which the transmission maintenance is carried out using AXE 10 and ZAN 201 TMC Transmission maintenance centre mission maintenance centre, TMC, is then used to collect information from ZAN 201 and AXE 10 terminals. Summary The maintenanceof digital transmission equipment in AXE 10 networks can be made more efficient if the exchanges are supplemented by the operation and maintenance system AOM101 and the transmission maintenance systems ZAN 101 and ZAN 201. The maintenance methods described here make it possible to improve the quality of service and provide a choice of varying degrees of automation and centralization. The maintenance routines can therefore readily be arranged to provide optimum adaptation to each Adminstration's organization for the maintenance of digital or mixed networks. References 1. CCITT Rec. G.704, Yellow Book III.3, updated by Draft Rec. M.2X. 2. Draft Rec. M.2Yand M.2Z. 3. Soderberg, L: Operation and Maintenance of Telephone Networks with AXE 10. Ericsson Rev. 56 (1979):3, pp. 104-115. 4. Nordqvist, G.: AOM101, an Operation and Maintenance System. Ericsson Rev. 56(1979):3, pp.116-123. 5. Eneborg, M. and Johansen, B.: Transmission Maintenance System ZAN 101. Ericsson Rev. 61 (1984):1, pp. 18-25.
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: 15 Fig. 9 Part of the junction netw
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 and 38: BENGTJANSSON KENT JOHANSSON TOMMY O
Page 39 and 40: 35 The control individuals are divi
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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