Integrated Services Digital Network: a system using telephone connections for sending information between computers. ISDN is a slower system than ADSL.
Synonyms and related words
Telephone services and companies
answering service
blue pages
the book
ISDN
noun uncountable
US /ˌaɪ es di ˈen/
DEFINITIONS1
1
Integrated Services Digital Network: a system using telephone connections for sending information between computers. ISDN is a slower system than ADSL.