1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 - TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!).4%.!.#% ).4%2.!4)/.!,G0G04%,%0(/.%G0G0#)2#5)430%2b) the physical environment of the existing circuit, switching and other equipment;c) the location of records of circuits, fault reports and service qualit
2、y;d) the location and availability of communication facilities;e) the existence of comparable national functions which might be expanded to include international aspects;f) the location of national system availability and traffic flow information which should be related to theinternational automatic
3、 network;g) the level of coordination that is anticipated between elements within the Administration;h) the staff workload that is anticipated for each element and the potential efficiencies involved in combiningelements;i) the anticipated ability to provide the necessary staff expertise and languag
4、e facility where needed;j) the arguments for and against centralization of a given element for an Administration;k) the availability of supervisory and surveillance facilities at potential maintenance locations;l) the existence of maintenance units for other services, e.g. leased circuits, having si
5、milar maintenancefunctions;m) the expected growth in international automatic and semi-automatic services in the country concerned;n) the expected evolution of the international network;o) the maintenance requirements and maintenance organization for Signalling System No. 6.Illustrative examples of p
6、ossible groupings of maintenance elements are given in Annex A.Note The maintenance organization described in this Recommendation does not preclude the use of theterms: international transmission maintenance centre (ITMC), international switching maintenance centre (ISMC) andinternational service co
7、ordination centre (ISCC). Administrations have the freedom to give names to their maintenanceunits which suit their situation and requirements.2.3 Cooperation between maintenance elements2.3.1 Cooperation between maintenance elements within an AdministrationElements should normally be free to contac
8、t each other as required except for any restrictions placed on suchcontacts by the Administration itself for reasons of efficiency or organization. The information paths and interactionsbetween elements will be influenced by any grouping of elements which an Administration may decide upon see 2.2abo
9、ve.Fascicle IV.1 - Rec. M.710 32.3.2 Cooperation between maintenance elements in different Administrations2.3.2.1 Maintenance elements should primarily communicate with their corresponding elements in other countries.Other channels of communication may also appear necessary or useful under certain c
10、ircumstances. Figure 1/M.710illustrates in a matrix, probable communication paths from an originating country to a distant country. It demonstratesthe possibility of fault reports, for example, from a number of elements to the distant fault report point (circuit).FIGURE 1/M.710.D01d01-sc2.3.2.2 Each
11、 fault report received by a fault report point should be identified (to include the date and the hour ifpossible) for reference by all concerned during fault clearance and for informing the reporting element of the dispositionof the faults. Fault reports should be accepted by any element performing
12、tests with a distant maintenance element. Theelement which accepts the report should always forward it to its appropriate fault report point. The fault report pointshould give priority to receiving fault reports and initiating fault clearances over all other duties.2.3.2.3 In addition to the require
13、ments of technical and operational knowledge, the staff responsible for the functionslisted in 2.1 above should be selected and trained with a view to avoiding language difficulties.The attention of Administrations is also drawn to the benefit that may be derived from enabling staff in theinternatio
14、nal telephone service who work in corresponding units in different countries to meet and discuss their work.4 Fascicle IV.1 - Rec. M.7103 Examples of cooperation between elementsThe examples of cooperation indicated in Figures 2/M.710 and 3/M.710 show only simple cases ofcooperation between elements
15、.FIGURE 2/M.710.D02d02-scFascicle IV.1 - Rec. M.710 54 Cooperation between maintenance elements and network management elementsWithin an Administration, considerable benefits can be obtained from close cooperation and coordinationbetween maintenance elements and network management elements3). In par
16、ticular, close liaison between the fault reportpoint (network) and the network management implementation and control point should be ensured.FIGURE 3/M.710.D03d03-sc5 Exchange of contact point informationThe most important benefit to be derived from defining the maintenance organization as consistin
17、g of anumber of basic elements is to establish the means whereby those responsible for such elements may be contacted.For efficient cooperation between maintenance elements in different countries, it is essential thatAdministrations frequently exchange appropriate contact point information (for exam
18、ple: telephone numbers, telexnumbers, service hours, etc.). Reference should be made to Recommendation M.93._3)For definitions of these terms, refer to Recommendation E.413 1.6 Fascicle IV.1 - Rec. M.710ANNEX A(to Recommendation M.710)Illustrative groupings of elements into maintenance unitsNote Net
19、work management elements, as defined in Recommendation E.413 1 may be combined with anyof the illustrative maintenance units mentioned in A.1 to A.3 below.A.1 All maintenance functions performed by a single maintenance unit (see Figure A-1/M.710).A.2 All circuit and equipment testing facilities are
20、at one location (maintenance unit A), while all network andsystem maintenance aspects are the responsibility of a separate unit (maintenance unit B) (see Figure A-2/M.710).A.3 All circuit matters are the responsibility of a single unit (maintenance unit A), while testing of switching andinterregiste
21、r signalling is performed by staff in the international exchange (maintenance unit B). A separate group ofstaff have responsibility for network analysis, network fault reports and service restoration (maintenance unit C). Systemavailability functions for the international network are carried out at
22、a location which has similar responsibilities for thenational network (maintenance unit D) (see Figure A-3/M.710).Testing point (transmission) Network analysis pointTesting point (switching and interregister signalling) Fault report point (network)Testing point (line signalling) System availability
23、information pointFault report point (circuit) Restoration control pointCircuit control and circuit sub-controlFIGURE A-1/M.710Maintenance unit A Maintenance unit BTesting point (transmission) Network analysis pointTesting point (switching and interregister signalling) Fault report point (network)Tes
24、ting point (line signalling) System availability information pointFault report point (circuit) Restoration control pointCircuit control and circuit sub-controlFIGURE A-2/M.710Fascicle IV.1 - Rec. M.710 7FIGURE A-3/M.710Reference1 CCITT Recommendation International network management-Planning, Vol. I
25、I, Rec. E.413.Maintenance unit A Maintenance unit BFault report point (circuit) Testing point (switching and interregister signalling)Circuit control and circuit sub-controlTesting point (line signalling)Testing point (transmission)Maintenance unit C Maintenance unit DFault report point (network) System availability information pointa)Network analysis pointRestoration control pointa)Where similar national functions are fulfilled.
