Inventors:
Martin J. Fornek - Lisle IL
Dennis R. Kinn - Geneva IL
Steven P. Meade - Bolingbrook IL
Blaine E. Welman - Wheaton IL
Assignee:
AT&T Bell Laboratories - Murray Hill NJ
International Classification:
H04J 312
H04Q 1104
Abstract:
An interface to an integrated service, digital network (ISDN) line for up to two analog dual tone, multifrequency telephones and up to four personal computers or data terminals. A stored program-controlled processor controls access to the ISDN line for the analog and digital interface circuits. The processor also provides access to switch-controlled ISDN features for the analog telephones (e. g. , call waiting, call hold, etc. ).