Patent ID: 11863703
Assignee: GLOBAL TEL*LINK CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method for detecting inmate to inmate conference calls, the method comprising:
obtaining and storing inmate profile information and inmate calling information of at least an inmate from a correctional facility;
monitoring an inmate communication by an inmate conference call detection server, wherein the inmate communication includes an audio signal;
converting the audio signal to a frequency domain signal over a predetermined window of time;
identifying a frequency peak in the frequency domain signal and a frequency value corresponding to the frequency peak;
storing the frequency domain signal associated with the inmate communication as a record in a communication database;
receiving inmate communication data for a new inmate communication;
converting the new inmate communication into a new frequency domain signal;
querying the communication database to determine if a portion of the new frequency domain signal for the new inmate communication matches frequency data in a detected record in the communication database;
identifying a number of frequency matches based on the determining;
comparing the number of frequency matches to a predetermined threshold value;
detecting an inmate to inmate conference call based on the comparing;
querying the communication database using parameter values corresponding to the inmate communication data; and
receiving in response to the querying using the parameter values corresponding to the inmate communication data, a list of records comprising a subset of the plurality of records with data matching one or more parameter values,
wherein the parameter values corresponding to the inmate communication data comprise a date of the inmate communication corresponding to the inmate communication data, a time of the inmate communication, a type of encoding of the inmate communication, a rate of encoding of the inmate communication, a location of an inmate communication device utilized during the inmate communication, and types of devices used during the inmate communication.