QT2022/32 - Data Sheet: DS3051
* tx_alarm bits 4 through 5 are read from the DOM device and mapped to registers 1.A070h.5:4. The function of
these bits is not specifically defined in the XENPAK MSA, but they are used in generating the tx_flag signal in order
to allow for vendor specific alarms to be defined. These alarms should be disabled via the associated MDIO regis-
ter bits 1.9006h.5:4 when not is use.
WIS_ALARM
WIS_ALARM is used to indicate that a WAN-related fault has occurred on the receive path. WIS_ALARM is the bit-
wise OR of the WIS Status 3 Register bits in register 2.21h. WIS_ALARM can be programmed to assert only when
specific receive path fault conditions are present. The programming is performed by writing to a mask register at
address 2.C500h. The contents of register 2.21h is AND’ed with register 2.C500h prior to application of the OR
function to generate the WIS_ALARM signal.
tWIS_ALARM = {OR of (reg 2.21h.n ‘bit wise AND’ reg 2.C500.n) for n=0..11}
Table 28: WIS Status 3 Register (WIS_ALARM)
MDIO Status Register
(RO)
MDIO Enable Register (R/W)
Description
Definition
Loss of Pointer
16b hex
2.21.0
type
RO/LH
16b hex
2.C500.0
2.C500.1
2.C500.2
2.C500.3
2.C500.4
2.C500.5
default value
LOP-P
AIS-P
PLM-P
LCD-P
AIS-L
0
Alarm Indication Signal
2.21.1
2.21.2
2.21.3
2.21.4
2.21.5
RO/LH
RO/LH
RO/LH
RO/LH
RO/LH
0
0
0
0
0
Loss of Label Mismatch
Path Loss of Cell Delineation
Line Alarm Indication Signal
Line Remote Defect Indication
RDI-L
LOS
LOF
Loss of Signal (based on no
transitions as described in
ANSI T1.416-1999)
2.21.6
RO/LH
2.C500.6
0
Loss of Frame
2.21.7
2.21.8
2.21.9
RO/LH
RO
2.C500.7
2.C500.8
2.C500.9
0
0
0
Reserved, set to 0
Far End AIS-P/LOP-P
Far-end Alarm Indication
Signal
RO/LH
Far End PLM-P/LCD-P
Far-end Loss of Label
Mismatch
2.21.a
RO/LH
2.C500.a
0
SEF
Severely Errored Frame
2.21.b
RO/LH
RO
2.C500.b
0
0
Reserved, set to 0
2.21.f:c
2.C500.f:c
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