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7. Monitoring and Troubleshooting
7-4
May 2002 8700-A2-GB20-40
IBMC Not Supported
on MCP
The Inband Management
Channel (IBMC) is enabled,
but the MCP card does not
support Inband Management.
1. Disable the Inband
Management Channel.
2. Download the MCP with a
version of code that supports
inband management.
IP Mismatch, Pt
n
The NTU and the LTU are
operating in different NMS
management modes: one is
in IP Conservative mode and
one is not.
In a DSLAM-to-DSLAM
configuration, use the same
software in the management
cards of both DSLAMs.
LOF at DSX-1,
Pt
n
An LOF (Loss Of Frame)
condition has been detected
on the DSX-1 interface. LOF
is declared when an OOF
state exists longer than 2.5
seconds.
1. Verify that the network cable
is securely attached at both
ends.
2. Verify the unit’s line framing
and line coding are
compatible with the attached
equipment.
3. Contact network provider.
LOF at G.703,
Pt
n
An LOF condition has been
detected on the G.703
interface. LOF is declared
when any three consecutive
frame synchronization bits
are incorrect, frames not
containing the frame
alignment signal are received
with an error three times
consecutively, or, for CRC-4
framing, CRC multiframe bit
alignment fails.
1. Verify that the network cable
is securely attached at both
ends.
2. Verify that the units line
framing and line coding are
compatible with the attached
equipment.
3. Contact network provider.
LOS at DSX-1,
Pt
n
An LOS (Loss Of Signal)
condition has been detected
on the DSX-1 interface. No
signal is being received on
Port
n
. LOS is declared when
175 consecutive zeros are
received.
1. Verify that the network cable
is securely attached at both
ends.
2. Contact network provider to
troubleshoot the line.
LOS at G.703,
Pt
n
An LOS condition has been
detected on the G.703
interface. No signal is being
received on Port
n
. LOS is
declared when 175
consecutive pulse
transmissions are received
with no pulse transitions.
1. Verify that the network cable
is securely attached at both
ends.
2. Contact network provider to
troubleshoot the line.
Table 7-1. Health and Status Messages (2 of 4)
Message What Message Indicates What To Do