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Monitoring and Troubleshooting
7-4
8700-A2-GB20-00
April 2000
Table 7-1. Health and Status Messages (2 of 3)
Message What To DoWhat Message Indicates
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. 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.
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.
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.
LOS at Net, Pt n An LOS (Loss Of Signal)
condition has been detected
on the network interface. No
signal is being received on
Port n, possibly due to a local
network problem.
1. Verify that the network cable is
securely attached at both ends.
2. Contact network provider.
Mismatch Rate,
Pt n
The LTU, set to a fixed DSL
rate, is attempting to operate
at a rate the NTU is not
capable of.
Set the LTU to a compatible rate or
replace the NTU.
Net Margin
Threshold, Pt n
The signal-to-noise margin
has exceeded the configured
threshold.
1. Check the Network Performance
Statistics screen for possible line
impairments.
2. Set the unit to run at a lower DSL
line rate.
3. Contact network provider.