Business sectors which often do voice logging include public safety (e.g. 9-1-1 and emergency response systems), customer service call centers (conversations are recorded for quality assurance purposes), and finance (e.g. telephone-initiated stock trades are recorded for compliance purposes).
Although voice logging is usually performed on conventional telephone lines, it is also frequently used for recording open microphones (e.g. on a stock trading floor) and for broadcast radio.
Early voice loggers recorded POTS lines onto analog magnetic tape.
With modern VoIP systems, many voice loggers now simply store calls to a file on a hard drive.
The original voice logging system was a large analog tape recorder developed by Magnasync in 1950.