NEC ux5000 Hardware Manual page 157

(2) Off-premise extension
One pair cable
(Non polarity)
The CN2 connector each provides connection to 4 analog DID trunk ports, which are polarity sensitive (tip
to tip, ring to ring). The OPX circuits, however, are not polarity sensitive. The DIOPU requires one universal
slot. If Program 10-03-01 has OPX defined, note that the blade will consume 4 trunk and extension ports when
installed. If OPX is not defined, then only trunks ports will be consumed.
Chapter 2
One pair cable
T(+)
(1) Analog DID Line
R(-)
T
R
Figure 2-33:
9.5" 19" Chassis
Chassis w/CCPU
2 5
Chapter 2 - Blade Installation and Startup
4DIOPU-A1
DID / OPX POLARITY
Blade Maximum's
19" Chassis 19" Chassis
w/o CCPU
6
System Max.
x4 w/Networking
23 Trunk: 50:
Station: 128
2 - 71