This standard was last reviewed and confirmed in 1997. Therefore this version remains current.
Includes changes to Subclauses: 3.3, 5.2.2, 5.4, and 5.5, there "relay system" shall be replaced by "network-relay system".
Status : PublishedPublication date : 1991-03
Edition : 1Number of pages : 1
Technical Committee:Telecommunications and information exchange between systems