ACB-100 Audio Control Board
Page 4
Document IM-ACB-100-2.5
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Slot
Position
C
2-7
C
8-10
C
14-16
C
17
C
11-13
AC
B
Card Cage Slot Positions
The groups are labeled as follows C
2-7
,
C
8-10
, C
11-13
, C
14-16
, and C
17
. The notation C
2-7
, for example, represents
the group of cards in slot positions 2 to 7. The various DSP workloads are distributed according to the following
table:
Configuration
C
2-7
C
8-10
C
11-13
C
14-16
C
17
No daughter card
DSP #1
DSP #1
DSP #1
DSP #1
DSP #1
Daughter card DSPs #2 & #3
DSP #1
DSP #2
DSP #2
DSP #3
DSP #3
Daughter card DSPs #4 & #5
DSP #1
DSP #1
DSP #4
DSP #1
DSP #5
Both Daughter Cards
DSP #1
DSP #2
DSP #4
DSP #3
DSP #5
Note: If a system is set up for conference calls, then DSP #5 will be running the conference functions and cannot
perform normal operations. Therefore you should not install an audio card with switch inputs (SAB or AIO cards
for example) in card cage slot 17. Cards such as a PAB, TSB, or DIO cards can be inserted in card slot 17 since
these cards do not depend on the DSP for support.
Each DSP is capable of supporting 4 master stations. The slot position of the SAB cards in the card cage and the
assignment of SAB channels to master stations must be made so as to satisfy this constraint.
4.
Card Cage Linking
The MicroComm DXI I/O card cages can be linked together to form a larger exchange. When card cages are
mounted in the same equipment rack, the link connection is via the DB-15 “Link” connector on the rear of the
ACB. CEPT trunks are available in fiber optic and cable versions.
4.1 Link Cable Interface
If there are two to three card cages in one equipment room, and they are mounted adjacent to each other in the
equipment racks (3 ft total from ACB to ACB), then the ACBs can be connected through a “back plane link” cable
for an inexpensive audio trunk link. One of these ACBs must act as the controlling ACB (the “master” ACB),
