Abstract: The invention relates to equipment for call-completion analysis on high speed data links in an SS#7 network. A pyramidal structure service observing system processes data packets from all high speed SS#7 data links communicates directly with other service observing systems in order to create real-time call detail records and statistical reports. The first system which receives an initial address message signal has jurisdiction over a call. If a second service observing system receives data on the same call, that data is forwarded to the first service observing system in real-time so that interim call detail records may be generated while calls are still in-progress. While any suitable and available path may be used to forward the data, a wide area network or a local area network provides the preferred path.

Abstract: Service observing equipment monitors, detects, decodes correlates and generates Call Records and Report Summaries from digital and audio information on an individual call basis on either ANSI or CCITT Signaling System #7 systems controlled by data packets transmitted along high speed data links separated from the telecommunication audio channels. The equipment simultaneously responds to in-band signals such as Automatic Number Identification (ANI) digits and/or Customer Entered digits transmitted over the audio channels. A Call's decoded content is stored as correlated data until the end of a monitored call. Then the stored data is custom formatted into a Call Record and transmitted or printed out to enable study of how trouble free the telecommunication network is performing, detect fraud or credit violations and/or validate billing situations.

Abstract: Service observing equipment monitors, detects and makes call records from digital and audio information on an individual call basis. The observation equipment can monitor both a Signalling System Seven (SS #7) and a CCITT #7 in which data packets are transmitted along the high speed data links separated from the telecommunication audio channels. The call record indicates how trouble free and efficiently (or how troubled and inefficiently) individual calls are processed by the telecommunication network. A plurality of separate memory locations are assigned on an individual call basis, for the duration of a given call, to store data received over any of many data links and communication channels relative to that given call. After the call has terminated, the accumulated data is analyzed to determine the call's final disposition. A call record is restored in memory for reports and/or transmitted to a printer or another processor.

Abstract: A call completion analysis system may be coupled to monitor any of many different kinds of telephone transmission equipment which may use any of a great variety of different kinds of signaling methods. At least one of the monitored equipments being a T-type carrier having a plurality of channels. The system receives and analyzes the variety of signals, including signals on any selected ones or all of the T-type carrier channels. At least some of the analyzed signals relate to call initiation, dial digits, duration, call completion and call abandonment conditions. The system gives both machine and human supervision and read out of the analyzed signals. Calls automatically forwarded to common carriers are monitored to insure correct billing by the office furnishing service to the call.

Abstract: A traffic usage recorder is used with a telephone switching network to verify the grade of service being given by observing simultaneous traffic on groups of equipments. The recorder has a plurality of input terminals, each of which may be connected with a corresponding input device, such as a sleeve lead which may be marked with a distinctive busy potential. The busy potential indicates circuit usage. The individual sleeve leads are repeatedly scanned in sequence to detect a presence or absence of the busy potential and therefore the circuit usage prevailing at the time of scan. The data derived therefrom is processed to indicate CCS units, peg count, maximum switch usage, and a cumulative time during which the maximum usage occurs. (The term C.C.S. means one hundred seconds of call time). Periodically (such as once every hour), the processed data may be read out in any suitable manner. The traffic usage recorder verifies the statistical tables which are used to make traffic studies.