Returns the customer's outbound call detail records (CDRs) — calls sent from the customer's SIP accounts to CommPeak for termination — newest first, with caller ID, destination, duration, cost and hangup cause. Without time_range the last 24 hours are returned. Results can be narrowed by tech prefix, caller ID, destination prefix and SIP account. Pagination is by page and per_page (default 100, max 1000); keep requesting the next page until an empty call_records array is returned, which signals end-of-data.