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
Because a subrate trunk facility interface operates in DCE mode with the subrate channel functioning
like a synchronous data channel, the BC-SR back card always operates in DTE mode. Subrate trunks
cannot pass clock signals, so you must make provisions for separate clock signalling sources for each
IGX node connected to the network solely through subrate trunks (see the “Connecting an NTM E1 or
Subrate Trunk” section on page 3-17 in the Cisco IGX 8400 Series Installation Guide).
Figure 2-11 BC-SR Faceplate
Table 2-13 BC-SR Back Card LEDs
LED Meaning
LOS (red) Loss of signal at the local end.
Bad CLK (red) Loss of clock or clock out of range.
Alarm (yellow) Loss of FastPacket alignment at remote end.
DSR (green) The DSR lead is high (on).
DTR (green) The DTR lead is high (on).
RXD (green) The receive data line shows activity.
TXD (green) The transmit data line shows activity.
BC-SR
RS 449/MIL188
X.21
V.35
Fail (red)
H8318
Active (green)
LOS (red)
Bad Clk (red)
Yellow alarm (yellow)
DSR (green)
DTR (green)
RXD (green)
TXD (green)