Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 1215 / 2536

RTRV-ALM 31 of 13 Page RTRV-ALM
Description Report Description Report
(Contd) Descriptions RTRV-ALM 11-3. Table
Meaning Description
LOF ref. sync. DS1 inc.
DS1 the on frame to unable is system The
signal. reference synchronization
providing clock the in failure Upstream causes: Likely
received the on ratio error bit high signal; reference the
that supply timing office the of failure by caused signal,
is system the reference; timing DS1 the provides
DS1 specified the on format SF for provisioned
DS1 received the and signal reference synchronization
format. ESF in is signal
LOS ref. sync. DS1 inc.
DS1 the in received were zeros consecutive 128 least At
the at energy the or signal, reference synchronization
threshold. preset a below is input DS1
that supply timing office the of Failure causes: Likely
the of failure or reference timing DS1 the provides
supply. timing the to connection
OOL ref. sync. DS1 inc.
is signal reference synchronization DS1 incoming The
providing clock the of frequency The (OOL). lock of out
specification. of out is signal reference DS1 the
that supply timing office the of Failure causes: Likely
reference. timing DS1 the provides
AIS DS3 fiber) (from inc.
signal indication alarm DS3 detected has system The
the from coming is, (that direction DEMUX the in (AIS)
signal. DS3 specified the for fiber)
is end far the at signal DS3 incoming The causes: Likely
far the at DSX-3 the from received is AIS DS3 or failed,
end.
AIS DS3 DSX) (from inc.
signal indication alarm DS3 detected has system The
the from coming is, (that direction MUX the in (AIS)
is alarm This signal. DS3 specified the for DSX-3)
only. pack circuit (BBG20) TMUX the to applicable
is end far the at signal DS3 incoming The cause: Likely
failed.
OC-3 DDM-2000
2000 February 2 Issue
11-545