Aspire (M/L And Xl) Common Equipment - NEC Aspire Manual

Section 2: Components

Aspire (M/L and XL) Common Equipment

Aspire 8 Slot KSU w/o PS — P/N 0890000
Aspire XL Power Supply Cabinet w/o PS — P/N 0890068
Central Processing Unit (NTCPU) PCB — P/Ns 0891002 & 0891038
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The KSU is the system's control center. It houses the Power Supply, has
nine PCB slots and provides for connection to trunks and extensions. The
Þrst slot in the KSU is dedicated to the NTCPU. The next slot is a univer-
sal slot which should be reserved for a Digital Station Card. The remain-
ing seven slots are also universal. They can be used for any combination
of Common, Trunk or Station PCBs. The KSU can be ßoor, wall or rack
mounted.
● You should plug a Digital Station Card into the Þrst universal slot.
The Aspire XL power supply cabinet accommodates up to two AC/DC
power supplies. This cabinet is to be installed as the bottom cabinet of a
3-cabinet system (the top two cabinets containing the NTCPU, DC/DC
Converters, and PCBs).
Note: The Aspire XL system can support mixed hardware conÞgura-
tions. With an Aspire XL AC/DC power supply cabinet and a DC/
DC Converter in one cabinet, the second cabinet can contain up to
two Aspire M/L power supplies (P/N 0891000).
The NTCPU controls all the functions and operations of the Aspire system
using the system software loaded into the NTCPU memory. One 32-bit
NTCPU PCB must be installed in the CPU slot in the Main Cabinet. There
are two versions of NTCPUs. The Þrst version, P/N 0891002, is a 64-port
basic NTCPU. The second version, P/N 0891038, is a feature-enhanced, 256
extension port NTCPU.
To upgrade from the basic 64-port NTCPU, a Feature Upgrade chip (P/N
0891039) is available. The NTCPU provides a connector (CN14) for the
upgrade PAL EPROM chip. Make sure when installing this upgrade chip on
the NTCPU that you wear a grounded wrist strap. Using software 4.0E and
higher, the Feature Upgrade PAL chip (P/N 0891039), supports 128 ports for
trunks, extensions, and voice mail (internal and external). With prior soft-
ware, only 64 ports are available.
Product Description