SANS 300103 : 1990 AMD 1 2007
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN); SUPPORT OF CCITT RECOMMENDATION X.21, X.21 BIS AND X.20 BIS BASED DATA TERMINAL EQUIPMENTS (DTES) BY AN ISDN; SYNCHRONOUS AND ASYNCHRONOUS TERMINAL ADAPTION FUNCTIONS
05-25-2015
01-12-2013
Specifies the connection of X.21 and X.21bis based terminals of user classes of service 3 to 7 and 19 to the ISDN operating in accordance with circuit-switched or leased circuit services.
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