Section 2: Components
28
Product Description
Aspire (M/L and XL) Common Equipment
Aspire 8 Slot KSU w/o PS — P/N 0890000
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
Þ
rst 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
ß
oor, wall or rack
mounted.
●
You should plug a Digital Station Card into the
Þ
rst universal slot.
Aspire XL Power Supply Cabinet w/o PS — P/N 0890068
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 con
Þ
gura-
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).
Central Processing Unit (NTCPU) PCB — P/Ns 0891002 & 0891038
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
Þ
rst 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.