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3
GENERAL DESCRIPTION
The 6521 consists of a standard 6U, 19" rack frame containing a 6511
motherboard which is powered via dual redundant PSUs and software
controlled (via serial interface type RS422 or RS232). A number of additional
plug in modules are fitted which together form the switcher these are:-
ISS 3 DEC 97
2161 Crosspoint Module
2414 Local Control Module
1124 Power Supply Module
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6521
6521
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