Installation Instructions

Site I/O , Span Line, RGPS and Modem Cabling for Sites Equipped With
Customer–Supplied Site I/O Interface
– continued
PRELIMINARY
SCt300 BTS Hardware Installation, ATP and FRU Procedures
DEC 2000
4-28
Table 4-25: Pin/Signal Information for Site I/O Cable
BTS Interface DescriptionWire/Stripe
Color
Yellow/Green RX TIP Primary (Redundant)
Yellow/Blue RX RING Primary (Redundant)
Yellow/Purple TX TIP Primary (Redundant)
Span (Redundant)
Yellow/Grey TX RING Primary (Redundant)
S
pan
(R
e
d
un
d
ant
)
Yellow/White RX TIP Secondary (Redundant)
Green/Black RX RING Secondary (Redundant)
Green/Brown TX TIP Secondary (Redundant)
Green/Red TX RING Secondary (Redundant)
Green/Orange MODEM TIP
Green/Yellow MODEM TIP
Phone (Modem)
Green/Blue No connection
Ph
one
(M
o
d
em
)
Green/Purple No connection
Green/Grey MODEM RING
Green/White MODEM RING
Connecting Customer–Defined
Inputs to the Site I/O Interface
The unit provides eight customer–defined inputs for connection to
external contacts. Each input (a signal/ground pair) is monitored for an
“OPEN” (>50 k Ohms) or “CLOSED” (<3 Ohms) condition.
4