Specifications

2-20
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Network Trunk Module
Figure 2-9 BC-E1 Faceplate
NTM Y1 Interface Back Card
The NTM Y1 interface back card (BC-Y1) terminates a Y1 line on the NTM front card, and provides the
following features:
• Physical interfaces to Japanese trunks (Y1)
• Support for coded mark inversion (CMI) line coding
• Support for Y1 trunk-formatted signaling
• Support for 24-channel, 1.544 Mbps operation
• Support for fractional rates
• Statistics reporting for Y1 line events (such as loss of framing, loss of signal, and framing errors)
• Configurable clock modes—normal clocking and loop timing
Figure 2-10 and Table 2-12 provide descriptions of the BC-Y1 status LEDs and connectors on the
faceplate.
BC-E1
Fail (red)
Active (green)
RX
RX/TX
TX
H8317
LOS (red)
Red alarm (red)
Yellow alarm (yellow)
AIS (green)
MFRA (red)
MFYA (yellow)