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This Recommendation outlines two approaches to destination-based measurement: call detail records and direct destination measurements. Three different methods of using call detail records are explained.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.040.35 : Telephone networks
|
| Number of pages | 10 |
| Replace | ITU-T E.491 (1992) |
| Year | 1990 |
| Document history | ITU-T E.491 (1997-05) |
| Country | Switzerland |
| Keyword | CCITT E.491;ITU-T 491;491;ITU-T E.491 |