Octel XC1000, Service Manual

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COMPONENT DESCRIPTIONS
10-12 Edition One XC1000 Service
provide system access to voice and data records stored on the drives. Each file
card has 8 MB of RAM. The file cards communicate with the system-drive and
message-drive modules through the main backplane and disk backplanes.
The system-file card determines where data is stored and controls the system
software, data tables, and phrases. The system-file card also contains a
speech-cache memory. The speech-cache memory stores frequently accessed
prompts that are shorter than or equal to 3 seconds, which reduces the
amount of time the file card must spend retrieving prompts from disk drives.
The message-file card determines where messages are stored and performs
the read and write operations to and from the disk drives.
In a standby-redundant XC1000, there are two logic-card sets; LEDs on the
front of the redundant XC1000 provide information about which card set is
active and performing the normal functions of the file cards.
LEDs are provided on the front edges of the file cards to indicate the status
of the card. Table 10-4 shows the LEDs and their functions.
Table 10-4. File Card LEDs.
LED Label LED Color Function
All File Cards
L9–L6 Green Internal diagnostics (used only during boot process)
L5 Green card processor running
L4–L3 Green Not currently used
L2 Red Fault (card out of service)
PWR Green Card rec5 Vdc
F20 File Cards
DDA Yellow Drive DMA acknowledge
SDA Yellow XC1000 bus interface (SBI) DMA acknowledge
DDR Yellow Drive DMA request
SDR Yellow SBI DMA request
DAT Yellow Drive attention
DCC Yellow Drive command complete
DSO Yellow Drive selected
DRY Yellow Drive ready
DPF Red Drive power fail; drive module internal voltage regulator
has failed (redundant XC1000)
DWV Red Drive write violation
TER Red Termination error; indicates that the termination resistors
are configured improperly (F20 file card only)
A Yellow Address to which card is assigned for standby redundancy;
part of redundant card set A
B Yellow Address to which card is assigned for standby redundancy;
standby redundancy; part of redundant card set B
ACT Green Card active (F20 file card only)
SBY Yellow Card in standby-redundancy mode (F20 file card only)
SECTION 10.2