Specifications

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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
NTM Front Card
Note There are two variants of the NTM front card: one uses an ACM1 adapter to connect two legacy card
designs and the other is a single card version built for the IGX chassis. While functionally identical, their
firmware cannot be interchanged. The single-card NTM requires firmware revision F or later.
An NTM front card can occupy any available front service card slot (slots 3 to 32). The module’s back
card depends on the desired trunk interface type. See the following usage information:
• For a T1 or fractional T1 trunk, use the BC-T1 back card.
• For a E1 or fractional E1 trunk, use the BC-E1 back card.
• For a Y1 or fractional Y1 trunk, use the BC-Y1 back card.
• For a subrate trunk, use the BC-SR back card; transmission rates range from 64 to 1920 kbps.
EIA/TIA-449, X.21, and V.35 connectors are available on the back cards.
For a description of the NTM front card faceplate, see Figure 2-7.
Figure 2-7 NTM Front Card Faceplate
BTM
Fail
Active
Minor
H9610
Major