ITU-T M 670 FRENCH-1988 MAINTENANCE OF A CIRCUIT FITTED WITH A COMPANDOR《装有压扩器的电路维护》.pdf

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1、UNION INTERNATIONALE DES TLCOMMUNICATIONS5)4 4 M.670SECTEUR DE LA NORMALISATIONDES TLCOMMUNICATIONSDE LUIT-!).4%.!.#% #)2#5)43 4 , 0(/.)15%3 ).4%2.!4)/.!58-!).4%.!.#% $ 5. #)2#5)4 15)0 $ 5. #/-02%33%52 %84%.3%522ECOMMANDATION 5)4 4c0 - (Extrait du ,IVRE “LEU)NOTES1 La Recommandation M.670 de l UIT-T

2、 a t publie dans le fascicule IV.1 du Livre Bleu. Ce fichier est unextrait du Livre Bleu. La prsentation peut en tre lgrement diffrente, mais le contenu est identique celui du LivreBleu et les conditions en matire de droits dauteur restent inchanges (voir plus loin).2 Dans la prsente Recommandation,

3、 le terme Administration dsigne indiffremment une administration detlcommunication ou une exploitation reconnue. UIT 1988, 1993Droits de reproduction rservs. Aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque formeque ce soit et par aucun procd, lectronique ou mcanique

4、 y compris la photocopie et les microfilms, sans laccordcrit de lUIT.Fascicule IV.1 - Rec. M.670 1Recommandation M.670Fascicule IV.1 - Rec. M.670MAINTENANCE DUN CIRCUIT QUIP DUN COMPRESSEUR-EXTENSEUR1 Essais en stationLes compresseurs-extenseurs doivent tre soumis des essais intervalles dtermins pa

5、r lAdministrationintresse. Ces essais doivent se faire sur la base des donnes de construction pertinentes qui devraient trecommuniques sous une forme approprie au personnel du centre dexploitation.2 Essais sur les circuitsIl nest pas recommand dessais objectifs particuliers des circuits pour lesquel

6、s on veut vrifier lefonctionnement du compresseur-extenseur, mais il conviendrait de faire un essai de conversation lors des essaisrguliers.Le niveau inchang du circuit et lavantage pour le bruit doivent tre vrifis conformment aux indicationsdonnes dans le 3 de la Recommandation M.590 intervalles dtermins par lAdministration intresse.

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