LAWO mc256 MKII, Техническое руководство

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mc²56 MKII Technical Manual V5.10.2/1 17
Chapter 1: Technical Overview
Redundancy
Link & Port Redundancy
For crucial interconnections between say a DALLIS and mc
2
/Nova I/O Module, you can specify either link, or link
and port, redundancy:
·
Link Redundancy – two physical connections (MADI or RAVENNA) are made from the DALLIS master
board to the mc
2
/Nova module. If the active link fails, then the redundant link ensures an automatic
recovery.
·
Link & Port Redundancy - two master boards are fitted to each DALLIS, and connect to different
mc
2
/Nova ports (preferably on a different module). Port redundancy provides automatic recovery from a:
o
Failure of the active physical link (MADI or RAVENNA).
o
Malfunction of the active DALLIS master board.
o
Malfunction of the mc
2
/Nova module.
To specify link redundancy:
·
MADI - order a double-port Nova73 module and DALLIS master board for each connection.
·
RAVENNA - install both the copper and fibre optic connections from the RAVENNA module / master
board .
To specify link & port redundancy:
·
MADI or RAVENNA - order two master boards per DALLIS plus enough single-port Nova I/O modules to
support the connections. AdminHD configures which ports provide redundancy.