ITU-T M 1012-1988 CIRCUIT CONTROL STATION FOR LEASED AND SPECIAL CIRCUITS《租用和专用电路的电路控制站》.pdf

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1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 - TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!).4%.!.#% ).4%2.!4)/.!,G0G0,%!3%$G0G0#)2#5)43#)2#5)4G0G0#/.42/,G0G034!4)/.G0G0 staff at the maintenance entities; transmission maintenance point (international line) (TMP-IL) (see Recommendation M.1014); su

2、b-control station either directly or via the TMP-II.When the circuit control station receives a fault report from the circuit sub-control station a unique referencenumber should be issued and given to the sub-control station. (If national practices already involve the issue of a uniquereference numb

3、er this may be used.)1)The reference number is recorded with the fault report by both the circuit controland sub-control stations.3.4 Controlling routine maintenance measurements and tests on the due dates if scheduled, using the specifiedmethods and in such a way that interruptions to service are l

4、imited to the shortest possible durations.3.5 Obtaining cooperation from the circuit sub-control station, either directly or via the TMP-IL.3.6 Directing the location of faults to the national line or the terminal national section in its own country, orbeyond the national line to the international l

5、ine, or to a foreign country.3.7 Controlling the withdrawal of circuits from service.3.8 Controlling the return of circuits to service, for example, after fault clearance, routine measurements, etc.3.9 Arranging for withdrawal of circuits from service with the customer.3.10 Keeping records of the ro

6、uting of the leased and special circuits.3.11 Knowing the possibilities of rerouting any circuit under its control._1)Where no such unique reference number exists, Administrations may wish to consider a format containing the following elements:serial number/day of month/time (e.g. 47/03/1400G).2 Fas

7、cicle IV.2 - Rec. M.10123.12 Advising the customer (or ensuring that this be done) of the progress of fault clearance if appropriate, forexample in the case of lengthy outages, and ensuring that the customer is advised when the fault has been corrected.3.13 Keeping accurate records of circuit outage

8、s. The information recorded should be agreed with the circuitsub-control station and should include: the reference number mentioned in 3.3; the circuit outage time; the location of the fault that is, in a national or international circuit section or in the renters equipment; the general nature of th

9、e fault.4 Appointment of control stationsFor each international leased or special circuit, a circuit control station is nominated by common agreementbetween the technical services of the Administrations concerned. For making the choice, special consideration will begiven to the location of the princ

10、ipal user and the length of the circuit within the territory of each terminal country.For unidirectional constituted circuits the circuit control station should be located in the receiving country.The circuit control station may be located at or near the terminal repeater station serving the user or

11、 at theterminal international centre which defines the terminal of the international line in the control country.The considerations involved in locating the circuit control station in a given country include the following: availability of staff; availability of adequate staff expertise; availability of communication with user and other pertinent locations; ability to fulfil the functions indicated in this Recommendation.