PL241029A1 - System for switching over exchange links for night operation in small capacity telephone automatic subscriber's exchanges
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System for switching over exchange links for night operation in small capacity telephone automatic subscriber's exchanges
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Application filed by Gdanskie Zaklady TeleelektronfiledCriticalGdanskie Zaklady Teleelektron
Priority to PL24102983ApriorityCriticalpatent/PL143367B1/en
Publication of PL241029A1publicationCriticalpatent/PL241029A1/en
Publication of PL143367B1publicationCriticalpatent/PL143367B1/en
PL24102983A1983-03-141983-03-14System for switching over exchange links for night operation in small capacity telephone automatic subscriber's exchanges
PL143367B1
(en)