Printed Circuit Board Description; Nfdu (Floppy Disk Drive Unit); Lccu (Central Control Unit) - Toshiba Perfecptione Installation And Maintenance Manual

INSTALLATION INSTRUCTIONS
SECTION 200-255-202
FEBRUARY 1992
netted to ground-start trunks must have ground
taps (tap buttons) in order to make outgoing calls
during power fail transfer conditions.
5.04 A transfer can be caused by a loss of power
or triggered manually by either of two buttons, one
of which is located on the underside of the atten-
dant console and the other on the front of the NPRU
PCB. A transfer that is caused by a power failure
will be reset automatically when power is restored;
a manual transfer must be reset manually.
5.05 When the DPFT is reset after a transfer,
existing PFT conversations will be protected. Indi-
vidual circuits will be restored only when they
become idle.
6. PRINTED CIRCUIT BOARD DESCRIPTION
6.00 Sixteen different types of PCBs are available
for use in both PERCEPTION systems (Figures 2-
7 & 2-8). The universal port architecture enables
multiple installation of trunk cards. The
PERCEPTlONe can support a maximum of 16
trunk cards; 8 in the basic cabinet, and 8 in the
expansion cabinet. The PERCEPTIONex can
support a maximum of 32 trunk cards; 24 in the
basic cabinet, and 8 in each expansion cabinet.
NFDU (Floppy Disk Drive Unit)-One
or two per
system: This card houses a 3.5 inch, 1.2 Mbyte
disk drive. One disk contains system program
and customer data. The second disk stores the
Maintenance and Administration programs. (Two
NFDUs are required in D.02 and later version
software using Remote Maintenance.)
LCCU (Central Control Unit)-One
per system:
The LCCU card contains the circuitry which,
under the direction of the system program, pro-
vides centralized control for the entire system.
Additionally, the LCCU performs data transmis-
sion and receiving functions between the central
control and all peripheral equipment, including:
l
Station PCBs
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Trunk PCBs
0 TTY interface
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SMDR interface
l
Lodging/Health Care audit interface
STATION, DATA,
TRUNK, DSS, OR
OCA CARDS ONLY
STATION, DATA,
TRUNK, DSS, OR
OCA CARDS ONLY
FIGURE P-7sPERCEPTION,
PC6 INSTALLATION
l
Modem interface
This circuitry consists of a 16-bit 8OC88 main
processor, an 8-bit Z-80 secondary processor,
and 1 Mbyte of memory.
NTWU (Time Switch Unit)-One
per system: This
card performs the time slot interchange function
for call processing and the conference features,
provides the digital speech paths with digital
padding, timing and control for time slot switch-
ing and generates system tones.
2-4