Telephone updating via network provided information

Details Telephone updating via network provided information Telephone updating via network provided information

1995-05-24

1998-03-24

Zele, Krista

Telephonic communications

Supervisory or control line signaling

Substation originated

379 9323, 379213, 379355, H04M 156

Patent

active

057321329

ABSTRACT:
A communication terminal apparatus is so adapted that when an outgoing call to the terminal of a desired party ends in failure, it is determined whether the cause of the failure is a change in the terminal number of the party's terminal. This determination is made based upon cause-indicating information contained in a message received via a communication line. In a case where it is found that the cause of the failure is a change in the party's terminal number, the new terminal number is acquired from the received message. A recall operation is then performed to place the outgoing call again, this time to the new terminal number that has been acquired.

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"Gaston Telephone Answering System and Solid-State Announcement Machine", R. Tanguy et al., Commutation & Transmission, No. 2, pp. 67-80, Jun. 1983.
"ISDN: Concepts, Facilities, and Services", Gory C. Kessler, Copyright 1990 McGraw-Hill Inc. pp. 224-226.

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