ITU-T M 762-1988 Maintenance of common channel Signalling System No 6《公共信道No 6信令系统的维护》.pdf
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1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 - TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!).4%.!.#% G0G0#/-/.G0G0#(!%,G0G03).!,).3934%-3-!).4%.!.#%G0G0/ rather, it proposes criteria regardingwhen and how such actions are to be initiated. Moreover, the general administration of the systems is con
2、sidered andnot the detailed interworking of its various equipments.1.3 Various maintenance organizational units may have functional responsibility for individual sub-systems whichcomprise a common channel signalling system (for example signalling terminals, processors, etc.). As the activities ofany
3、 of these units will have an effect on the overall operation of the signalling system, and because in some cases itmay not be possible to independently determine a need for maintenance attention, one point should be designated as anoverall signalling system control. This point is titled signalling s
4、ystem administrative control. The corresponding pointat the distant terminal is known as the signalling system administrative sub-control.2 Appointment of administrative control and sub-control2.1 The appointment of administrative control and sub-control will be made by agreement between theAdminist
5、rations involved. These two points must be assigned for each signalling system which is placed in operation.It is suggested that the most appropriate point to act as administrative control or sub-control is the maintenance unithaving responsibility for the signalling terminal and processor. However,
6、 this matter is left to the discretion of theAdministrations concerned.2.2 In the case of multiple signalling systems between the same two points, it may be appropriate to divide controland sub- control assignments, therefore sharing the burden of control responsibility. This is a subject for agreem
7、entbetween the Administrations concerned; however, this assignment and that of the control station for the transfer linkshould be to the same Administration.3 Functions and responsibilities of the administrative controlThese responsibilities fall into four main areas:i) day-to-day maintenance of wor
8、king systems;ii) history and long-term analysis;iii) operation under signal transfer point (STP) configurations;iv) implementing a new signalling system, or an existing signalling system modification.3.1 Day-to-day maintenance of signalling systems3.1.1 Except as noted in 3.1.2, maintenance activity
9、 on any part of a common channel signalling system must onlybe undertaken with the agreement and knowledge of the administrative control. Such activities might relate to routinemaintenance measurements of the transfer link, service affecting reconfigurations of transmission systems over whichthe tra
10、nsfer link is routed (i.e. planned outages), the temporary removal from service of a signalling terminal, etc.2 Fascicle IV.1 - Rec. M.7623.1.2 In the event of total failure of a signalling system due to a malfunction of one of its parts, immediate stepsshould be taken to remedy the fault condition.
11、 As soon as possible, the administrative control should be informed sothat the event can be correlated with other reported events or known signalling failures. An example of such a faultevent might be the failure of a transmission system over which the transfer link is routed1).3.1.3 Faults which ar
12、e observable only at a signalling system terminal, for example intermittent failures resultingfrom an apparent high data bit error rate, must be analysed by the administrative control (and sub-control, dependingon the direction of the indicated fault) in order to determine where maintenance attentio
13、n is required. Such dynamicanalysis might involve terminal diagnostic tests, error performance tests with the distant terminal, etc. The result of thisdynamic analysis and tests will be corrective action, taken either by the administrative control or the sub-control ifunder eithers jurisdiction, or
14、the referral by the administrative control to the indicated part of the maintenanceorganization, for example the control station for the transfer link.3.2 History and long-term analysis3.2.1 The administrative control should maintain a record of all recognized or reported faults pertaining to eachsi
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