XRT86VL32_2 Datasheet, PDF (96/155 Pages) Exar Corporation – DUAL T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

XRT86VL32
DUAL T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION
REV. V1.2.0
TABLE 80: ALARM & ERROR INTERRUPT STATUS REGISTER (AEISR)
HEX ADDRESS: 0XnB02
BIT FUNCTION TYPE DEFAULT
DESCRIPTION-OPERATION
7 Rx OOF
State
RO
0 Receive Out of Frame Defect State
This READ-ONLY bit indicates whether or not the Receive T1 Framer block is
currently declaring the “Out of Frame” defect condition within the incoming T1
data-stream, as described below.
Out of Frame defect condition is declared when “TOLR” out of “RANG” errors in
the framing bit pattern is detected. (Register 0xn10B)
0 – The Receive T1 Framer block is NOT currently declaring the “Out of Frame”
defect condition.
1 – The Receive T1 Framer block is currently declaring the “Out of Frame” defect
condition.
6 RxAIS State RO
0 Receive Alarm Indication Status Defect State
This READ-ONLY bit indicates whether or not the Receive T1 Framer block is
currently declaring the AIS defect condition within the incoming T1 data-stream,
as described below.
AIS defect is declared when AIS condition persists for 42 milliseconds. AIS defect
is cleared when AIS condition is absent for 42 milliseconds.
0 – The Receive T1 Framer block is NOT currently declaring the AIS defect con-
dition.
1 – The Receive T1 Framer block is currently declaring the AIS defect condition.
5 RxYEL
State
RO
0 Receive Yellow Alarm State
This READ-ONLY bit indicates whether or not the Receive T1 Framer block is
currently declaring the Yellow Alarm condition within the incoming T1 data-
stream, as described below.
Yellow alarm or Remote Alarm Indication (RAI) is declared when RAI condition
persists for 900 milliseconds. Yellow alarm or RAI is cleared immediately when
RAI condition is absent even if the T1 Framer is receiving T1 Idle or RAI-CI signa-
tures in ESF mode.
0 – The Receive T1 Framer block is NOT currently declaring the Yellow Alarm
condition.
1 – The Receive T1 Framer block is currently declaring the Yellow Alarm condi-
tion.
4 LOS_State
RO
0 Framer Receive Loss of Signal (LOS) State
This READ-ONLY bit indicates whether or not the Receive T1 framer is currently
declaring the Loss of Signal (LOS) condition within the incoming T1 data-stream,
as described below
LOS defect is declared when LOS condition persists for 175 consecutive bits.
LOS defect is cleared when LOS condition is absent or when the received signal
reaches a 12.5% ones density for 175 consecutive bits.
0 = The Receive T1 Framer block is NOT currently declaring the Loss of Signal
(LOS) condition.
1 = The Receive T1 Framer block is currently declaring the Loss of Signal (LOS)
condition.
3 LCV Int
Status
RUR/
WC
0 Line Code Violation Interrupt Status.
This Reset-Upon-Read bit field indicates whether or not the Receive T1 LIU block
has detected a Line Code Violation interrupt since the last read of this register.
0 = Indicates no Line Code Violation have occurred since the last read of this reg-
ister.
1 = Indicates one or more Line Code Violation interrupt has occurred since the
last read of this register.
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