1、 TIA-561-1990 APPROVED: MARCH 20, 1990 REAFFIRMED: DECEMBER 10, 1998 REAFFIRMED: DECEMBER 19, 2003 REAFFIRMED: DECEMBER 7, 2012 TIA-561 March 1990Simple 8-Position Non-Synchronous Interface Between Data Terminal Equipment and Data Circuit- Terminating Equipment Employing Serial Binary Data Interchan
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