Specifications

2-21
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 2-10 BC-Y1 Faceplate
NTM Subrate Interface Back Card
The subrate interface back card (BC-SR) terminates subrate trunks on the NTM. The BC-SR provides
the following features:
• Trunk rates of 256 kbps, 768 kbps, 1024 kbps, 1536 kbps, and 1920 kbps
• V.11/X.21, V.35, and EIA/TIA-449 interface connectors (see Figure 2-11)
• Synchronization of the trunk clocking with looped clock option (not applicable to X.21)
• A limited set of EIA control leads monitored by the system (see Table 2-14)
Table 2-12 BC-Y1 Back Card LEDs
LED Meaning
LOS (red) Loss of signal at the local end.
Red alarm (red) Loss of local frame alignment.
Yellow alarm (yellow) Loss of frame alignment at the remote end.
AIS (green) Presence of unframed all-ones on the line.
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