NEC NEAX 2000 IPS Manual page 69

Example of MDF Cross Connection for CS (BS21/BS21A)
NOTE 1:
RJ-45 Modular plug is highly recommended.
Keep all wiring straight to the plug and perform all reverses at the cross connect for future
changes.
(8) (1)
Terminal
number
Front view
TERMINAL
COLOR
NUMBER
1 blue
2 orange
3 black
4 red
5 green
6 yellow
7 brown
8 slate
NOTE 2: Confirm that the electric potential between TA/TB and RA/RB (feed polarity) is normal before
connecting CS to modular plug.
TA/TB minus
RA/RB plus
Side view
TERMINAL
TERMINAL
NUMBER
EQUIPMENT
a Not used
b Not used
c Transmission
d Reception
e Reception
f Transmission
g Not used
h Not used
FUNCTION
CSI
Not used
Not used
Reception
Transmission
Transmission
Reception
Not used
Not used
– 59 –
CHAPTER 2 INSTALLATION
CONNECTION OF LEGACY CS
2
3
4
5
6
8
7
POLARITY
TERMINAL
SIGNAL FEED
+ –
+ –
– +
– +
NWA-008855-001 Rev.1.0
1
CSI
RA
TA
TB
RB
avch2001.fm