Lucent DDM-2000 OC-3 User And Service Manual page 667

TAP-107
: Trouble Clearing
Page 23 of 28
Table B – RTRV-ALM Message Descriptions (Continued)
Description
inc. VT sig degrade (BER)
inc. VT unequipped
inc. VT yellow
inconsistent DCC values
inhibit auto. OS messages
Alarm
Level
MJ or MN
MJ or MN
NE ACTY
MJ
ABN
DDM-2000 OC-3 M
Issue 2, February 2000
Meaning
In a VT path switched ring, the system has
detected a VT error rate that exceeds the
provisioned threshold of 10
selects a good VT signal from the other ring path.
Likely causes: An OLIU circuit pack failure or a
fiber failure at some point on the failed ring.
The system has detected the unequipped code
(SONET path overhead VT signal code label
byte=0) on an in-service VT1.5 channel.
Likely causes: An upstream VT1.5 cross connect
has been deleted or a DS1 LOW SPEED slot has
been unequipped.
The far end is detecting VT AIS or VT LOP and
inserting VT yellow in its transmit signal.
Likely causes: Unprotected failure of a DS1 circuit
pack at the near end, a DS1 circuit pack at the far
end, an MXRVO circuit pack at the near end, an
MXRVO circuit pack at the far end, or fiber at some
point in the end-to-end path.
The Network Side/User Side parameters are set
the same at both ends of a DCC (optical span).
(See the set-fecom: command.)
This message occurs when TL1 autonomous alarm
reporting is inhibited by the TL1 INH-MSG
command. This message is cleared by enabling
autonomous message reporting with the TL1
ALW-MSG command.
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