
1 OVERVIEW
3006M100-002
1-7
1.2.5
Constraints
Certain I/O cards cannot coexist in the same CX900e chassis. A C54 DSP is used
on the DAV I/O card, the ISDN BRI-S/T Digital Voice I/O card, and the DIM I/O
card. These cards therefore cannot be used in the same chassis as the DDVC card
(which must be used with the ISDN BRI S/T I/O Card) and the Analog Voice I/O
card, which use a C31 DSP.
1.2.6
Optional Cards
The following paragraphs describe optional plug-in cards that support the
functionality of specific I/O cards on the motherboard.
Serial
Expansion
Module
The Serial Expansion Module (SEM) provides Serial Communications
Controllers (SCCs) for I/O slots 5 through 8. The SEM must be installed
whenever an I/O card requiring access to a serial communication controller is
installed in one of these slots (5-8).
Ring
Generator
The Ring Generator supplies -12VDC, -48VDC, and 86VAC (ringing voltage) to
the Analog Voice I/O card. The Ring Generator is required for the Dual Analog
Voice I/O card (DAV I/O) as well, however, the LIDs on the DAV I/O card
generate their own ringing voltage.
Summary of Contents for CX900e
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