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INSTALLATION INSTRUCTIONS
SECTION 200-255-204
FEBRUARY1992
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TBBOI
TB701
TB601
TB501
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IYIVIUU 3 I mrruw
circuit may be used for a DDIU (-MA or -MAT)
connection. Use the DDIU Program in Section 200-
255-300, Programming, to assign the desired port
(1 -, 4) on the NMDU.
3.94 The NDCU PCB is installed at a rate of one
PCB for each group of eight DDIUs. There are no
strapping options on this PCB.
NOTE:
The NMDU and NDCU PCBs are not used
with the PDIUs. PDlUs use the NDKU PCB.
4. CABLE CONNECTIONS
4.00 All connections to the system are made on
the rear of the basic and expansion cabinets and on
the Power Failure Transfer Unit. Cables with stan-
dard male 25pair amphenol-type connectors are
used for everything except the TTY, SMDR and
MODEM connectors (which require male RS-232C
DB25pin connectors).
4.01 Detailed connection information for each cable
is shown in Chapter 5.
IMPORTANT!
Note the station, trunk, DSS console, and
DDIWPDIU connections are identified by
the PCB location and circuit number on
that PCB. These numbers combine to form
a Port Number and are used in the pro-
gramming section as the station, DSS con-
sole, or trunk circuit' s identifier when di-
rectory numbers and features are assigned.
4.02 Determine the station and DSS console (or
data) port numbers as follows (DSS consoles as-
signed to L or U slots use circuits 1, 3, 5, & 7):
PCB
PCB
LOCATION
CIRCUIT
PORT NO.
FL LOO - L26orCOO
1 - 8
I FL uoo-
u31
t
l-8
1
I
1 Example:
LO1
2
LO12
4-19
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