D21m System
Introduction 2-3Date printed: 11.07.07
2.2 The Frame and its Cards
I/O Example:
3 Dual Card Slots
Rear View:
Front View:
I/O Example:
1 Dual-Slot Card
4 Single-Slot Cards
Main and Redundant
Power Supply
1...2 HD Link Cards
(Link to DSP Core)
RS422 Serial
I/O Card
The 3 U frame provides 12 slots for I/O card insertion. Each card may provide
a different number of I/O channels, depending on its capabilities (e.g. a micro-
phone card provides four channels of microphone inputs, while an ADAT card
provides 16 channels of inputs and outputs simultaneously). Some cards are
mechanically occupying two slots, and therefore a maximum of 6 double-
width cards may be inserted into a frame. An overview of the different cards
currently available is given in chapter 6.1.
The frame hosts one or two “High Density Link” cards (short: HD Link),
providing the main audio connection to the DSP core. From the HD card(s)
the signals are redirected to the different types of I/O cards in the frame.
Therefore at least one HD card must be inserted in the frame.
The frame may be equipped with redundant power supplies, the status of
which can be displayed in the Vista console’s system surveyor page.
Please note that the rack mounting brackets may be installed either on the
front (as shown on the opposite page) or on the rear of the frame.
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