In the capacity that pertains to my question public records requests for CDR are provided by my department (Telecommunications) as we are the Telco for the voice services we change back to for a University. More specifically we are required to retain this data for internal and external calling. The carrier would not have any internal call records within the PBX so we must be able to keep 3 years worth of this data. Phone system does not have a way to pull 30+ days of CDR even if we were using Direct Routing instead.
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