Site I/O , Span Line, RGPS and Modem Cabling for Sites Equipped With
Customer–Supplied Site I/O Interface
– continued
PRELIMINARY
SC
t
300 BTS Hardware Installation, ATP and FRU Procedures
DEC 2000
4-28
Table 4-25: Pin/Signal Information for Site I/O Cable
BTS Interface
Description
Wire/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)
Span (Redundant)
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
Phone (Modem)
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