PDH Tabs
324
FTB-8100 Series Transport Blazer
E4/140M RX
Alarm Analysis
Note:
Only AIS is available when the framing is set to Unframed.
³
LOF
(Loss Of Frame): The LOF alarm indicates that four consecutive
incorrect frame alignment signals have been received.
³
RAI
(Remote Alarm Indication): The RAI alarm is declared when bit 13
of a framed E4 is set to “1”.
³
AIS
(Alarm Indication Signal): The AIS alarm is declared when an
unframed all-ones signal is received.
Spare Bits
Note:
Spare Bits are not available when
Framing
is set to
Unframed
.
G.751 Bit 14, 15, 16
are reserved for national use. Possible values are
000
to
111
.
Содержание FTB-8100 Series
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