Apparatus for interfacing analog telephones and digital data terminals to an isdn line
作者： Blaine Eugene Welman , Steven Patrick Meade , Dennis Ralph Kinn , Martin James Fornek
DOI:
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摘要: An interface to an integrated service, digital network (ISDN) line for up two analog dual tone, multifrequency telephones and four personal computers or data terminals. A stored program-controlled processor controls access the ISDN circuits. The also provides switch-controlled features (e.g., call waiting, hold, etc.).
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