H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 1/66 (2006.01) H04M 3/22 (2006.01) H04Q 1/18 (2006.01) H04Q 1/20 (2006.01) H04Q 1/22 (2006.01) H04Q 1/24 (2006.01)
Patent
CA 2171076
The disclosed method prevents fraud in an inband signalling telephony system, such as a No. 5 signalling system. It includes a first step of detecting a fraudulent inband signal at a predetermined location of an outgoing signal path between an input terminal Os and an output terminal Oss of a trunk module T included in the inband signalling telephony system. The predetermined location is situated between the input terminal Os and an injection terminal I of the outgoing signal path where an inband signal can be injected. In a second step, the fraudulent inband signal is removed from the outgoing signal path by interrupting this path during a time interval at least equal to the duration of the inband signal. The trunk module realizing this method includes a receiver similar to the receivers used in the inband signalling path of the trunk module to detect incomming inband signals and to filter these out before transmitting the signal to a user station connected to the trunk module. This receiver is coupled betwwen the above mentioned input terminal Os and the injection terminal I.
Alcatel N.v.
Robic
LandOfFree
Method for preventing fraud in an inband signalling... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preventing fraud in an inband signalling..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preventing fraud in an inband signalling... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1612120