Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
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Chapter 2 Cisco IGX 8400 Series Cards
Network Trunk Module
NTM T1 Interface Back Card
The NTM T1 interface back card (BC-T1) terminates a single 1.544 Mbps T1 trunk on the network trunk
module in the IGX, and provides the following features:
• AMI and B8ZS (bipolar 8 zero-suppress) line codes
• D4 and extended super-frame (ESF) framing formats
• Configurable full or fractional T1 service
• Configurable line buildouts for cable lengths up to 655 feet
• Configurable clock modes (normal clocking and loop timing)
• Communication of line event information to the NTM front card
The BC-T1 uses a DB-15 interface connector (see Figure 2-8) and has loss of signal and loss of
FastPacket alignment indicators on the back card faceplate (see Table 2-10).
Figure 2-8 BC-T1 Back Card Faceplate
BC-T1
Fail (red)
Active (green)
T1 input/output
LOS (red)
Red alarm (red)
Yellow alarm (yellow)
AIS (green)
H8316