Method and system for loop prevention in telecommunications
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United States of America Patent
Stats
-
Mar 6, 2001
Grant Date -
N/A
app pub date -
Nov 4, 1997
filing date -
Nov 5, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to a method for telecommunications and a device for that method. A first time slot is assigned for a first channel (2) between a first local exchange (LEA) to which a first subscriber (A) is connected or is being connected, and a second local exchange (LEB) to which a second subscriber (B) is connected or is being connected. A second time slot is assigned for a second channel (4) between the first local exchange (LEA) and a third local exchange (LEC) to which a third subscriber (C) is connected or is being connected. The first subscriber (A) makes a request that the second subscriber (B) and the third subscriber (C) shall continue to be or shall become connected, while the first subscriber (A) is disconnected. According to the invention, a transmitter (16) sends at least one tone in one of the time slots, a timer (17) is started and a receiver (15) listens in the other time slot. If the receiver (15) has not detected the tone before the timer (17) has elapsed, the request is executed.
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