| 摘要 |
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. An integral ZIP System simultaneously monitors the stored call data and is ready at all times during the call to generate interim ZIP Records to let the telephone system or recipient take corrective action while a call is in progress. Examples of such corrective actions are to trace the switching route and troubleshoot defective call setups before termination, to trap on Hot number, long-duration and/or duplicate credit card calls to prematurely terminate service and prevent fraud, to trace annoyance or malicious call and tape conversations, to eliminate abuse of pre-paid billing credit and the like.
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