Nemu, Ncou, And Nlsu - Toshiba Perfecptione Installation And Maintenance Manual

INSTALLATIONINSTRUCTIONS
SECTlON200-255-204
FEBRUARY1992
are UOO M U31. There are no straps on the PCB for
either system.
3.60 NDSU
3.61 Install the NDSU PCB either in the COO or CO1
slots or in any of slots LOO - Ll 1 or L15 - L26 in the
PERCEPTION, system. Two NDSUs can be
installed in the same cabinet. There are no straps
on this PCB. There are no C slots resident within
the PERCEPTION,, system so NDSU PCB instal-
lation will be in any U slot .
3.70 NEMU, NCOU, and NLSU
3.71 Trunk PCBs (NEMU, NCOU, and NLSU) may
be installed in any T slot. Additionally, up to 16 U
slots may also be
used
for trunk PCBs.
3.72 There are four circuits on the NEMU PCB,
and each circuit has its own set of straps (Figure 4-
18). On a circuit-by-circuit basis, strap the PCB as
follows:
1) For Type VII operation:
CIRCUIT
CIRCUIT STRAPS
OPERATION
TYPEI 1 TYPEII
TB 101
I
1 TB 102
TB 106
TB 201
2 TB 202
TB 206
TB 301
3 TB 302
TB 306
TB 401
4 TB 402
TB 406
l-2
2) For 2-wire/4-wire connection:
2-3
CIRCUIT STRAPS
CONNECTION
2-WIRE 1 4-WIRE
TB 103
I
3) For 600-/900-ohm operation:
CIRCUIT STRAPS
OPERATION
6000hm 1 900 ohm
4
TB 104
I
I-
I
1 TB105 1
I
I
3.73 The NCOU PCBs have Ground-/Loop-start,
600/900-ohm termination, and 2dB pad strap se-
lections that must be made before they are installed
(Figure 4-19).
1) Each NCOU circuit is individually strapped for
either Ground Start or Loop Start operation.
The strapping location and options for each
circuit are shown as follows:
OPERATION
STRAPS
GND ST
LP ST
Extend
$ind Normal Reverse
1 TB 104
2
TB 204
B-CD-E
C-DA-B
3 TB 304
4 TB 404
NOTES:
1. The GROUND START "EXTEND/NO EX-
TEND" options refer to "loop extenders"
on long trunk loops. If a battery boost is
used on the trunk, select EXTEND, other-
wise NO EXTEND should be selected.
2. The LOOP START "NORMAL/REVERSE"
options refer to the system' s ability to
detect a pre-ring supervision signal in the
form of a battery polarity reversal on the
CO TIP and RING.
l
lf NORMAL is selected, the system will
not
be
sensitive to CO trunk polarity.
l
If REVERSE is selected, the CO cir-
cuit will be "made busy" when the CO
reverses polarity prior to ringing on an
incoming call.
4-13