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Application filed by Politechnika WarszawskafiledCriticalPolitechnika Warszawska
Priority to PL27087888ApriorityCriticalpatent/PL157669B1/en
Publication of PL270878A1publicationCriticalpatent/PL270878A1/en
Publication of PL157669B1publicationCriticalpatent/PL157669B1/en
PL27087888A1988-02-261988-02-26Circuit arrangement for connecting a two-subscriber line to an exchange by means of a subscriber line unit
PL157669B1
(en)
Method of establishing data transfer connexions in a telmethod of establishing data transfer connexions in a telecommunication exchange ecommunication exchange