Alarms/Errors
912 FTBx-88000 Series
Alarms
Alarms
AIS (Alarm Indication Signal) for DS1/E2/E3/E4, indicates that an
unframed all-ones signal is received.
AIS (Alarm Indication Signal) for DS3, indicates that the M-frame
contains zeros (0) for C-bits, ones (1) for X-bits, 1010... repeating
sequence with a one (1) immediately following any of the control bit
positions for the information bits.
AIS (Alarm Indication Signal) for E1, indicates that two or less ZEROs
are received in each of two consecutive double frame periods (512
bits).
AIS (Alarm Indication Signal) for FlexO, indicates that the STAT
information in the PM byte 3, bits 6 to 8 of ODUC #1 is “111” for at least
15 consecutive frames. In TX, generates an all "1"s pattern in the entire
ODUC signal, excluding the frame alignment overhead (FA OH), and
OTUC overhead (OTUC OH).
AIS (Alarm Indication Signal) for FlexO OTUCn, indicates that he STAT
bits in the SM overhead field (byte 3, bits 6 to 8) of the OTUC #1 are
“111” for at least 15 consecutive frames. In TX, generates all ones over
each OTUC of the signal excluding the OH framing (FAS and MFAS).
AIS (Alarm Indication Signal) for OAM with G.8113.1/Y.1731/MEF mode,
indicates that a valid AIS frame is received. A valid frame has its
destination MAC address matching either the unit port Unicast MAC
address or a Multicast class 1 address (refer to page 889), VLANs
matching the unit port VLANs, and MEG level matching the local MEG
level. The alarm is cleared when during an interval equal to 3.5 times
the AIS transmission period indicated in the last received AIS frame, no
AIS frames are received.
AIS (Alarm Indication Signal) for ODU, indicates that the STAT
information in the PM byte 3, bits 6 to 8 is “111” for at least
3 consecutive frames. In TX, generates an all "1"s pattern in the entire
ODUk signal, excluding the frame alignment overhead (FA OH), OTUk
overhead (OTUk OH) and ODUk FTFL.
To Next Page