EXFO FTB-1, User Manual

Page: 340 / 675

Test Results
328
FTB-700G/800 Series
Alarms/Errors
Note: The following alarms are available with G.8113.1, Y.1731 and MEF modes.

AIS
(Alarm Indication Signal)
RX : 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 638), 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.

LCK
(Locked)
RX : An valid LCK 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 638), 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 LCK
transmission period indicated in the last received LCK frame, no LCK
frames are received.

C-LOS
(Client Signal Fail - Loss Of Signal)
RX : A CSF frame is received with CSF type equal to 000 . The alarm is
cleared when no CSF (C-LOS) frames are received during an interval
equal to 3.5 times the CSF transmission period indicated in the last
received CSF (C-LOS) frame, or when a CSF frame is received with
Client Defect Clear Indication (C-DCI) information (CSF Type 011).
TX
: Generates a CSF frame with CSF type equal to
000
.