36 Common Equipment cards
QPC584 Mass Storage Interface
System Hardware-System
option 51/61/71
i
Purpose-Interface
between the Multi Disk Unit (MDU) and CPU(s).
Provides address matching, disk drive control, data buffering and interrupt
control circuits.
The MS1 is used with the MDU and contains:
-two high capacity floppy disk drives or
-one Winchester disk drive with two high capacity floppy drives as backup
Note:
QPCSS4D or later vintage is required.
Quantity-One
MS1 circuit card for each
CPUFIDU.
QPC687 CPU with SDVRTC
System Hardware-System
option 21 and 21A
Purpos+This
is a stand-alone
CPU card with error correction, real-time
clock, and one SD1 port
Note:
QPC687B or later vintage is required.
Quantity-One per system
QPC720 Primary Rate Interface
System Hardware-All
Purpose-The
ISDN Primary Rate Interface (PRI) card allows twenty three
64 Kbps clear channel operation with a single 64 Kbps common signaling
channel. It is used in conjunction with DCHI to provide PRA. The PRI
circuit card provides the physical DS-1 interface and is also used for DTI
applications.
Quantity-One
per Primary Rate Access (PRA) or DTI link
Equipment identification and ordering information 553-3001-154
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