Trunk Cards 4-45
Network Trunk Module
Figure 4-26 BC-Y1 Faceplate
Table4-21 BC-Y1 Connections and Status LEDs
Connector/Indicator Function
Y1 Trunk input/output DB-15 connector for Y1 trunk
Line in Y1 trunk input line
Line out Y1 trunk output line
RX MON BNC test connector for monitoring receive Y1 line
TX MON BNC test connector for monitoring transmit Y1 line
LOS light (red) Indicates loss of signal at the local end
Red alarm light (red) Indicates loss of local frame alignment
Yellow alarm light (yellow) Indicates loss of frame alignment at the remote end
AIS light (green) Indicates the presence of all ones on the line
Fail light (red) Indicates an error occurred. First, reset the card with resetcd f. If the
LED comes on again, contact the TAC through Customer Engineering
Active light (green) The card is in service and has active circuits
BC-Y1
LOS (red)
Red alarm (red)
Yellow alarm (yellow)
AIS (green)
Fail (red)
Active (green)
RXMON - monitor jack
Y1 trunk input/output
TXMON - monitor jack
H8319
Line in
Line out