XRT86L30
REV. 1.0.1
SINGLE T1/E1/J1 FRAMER/LIU COMBO
TABLE 16: ALARM
G
ENERATION
REGISTER - E1 MODE
R
EGISTER 8 -E1 MODE
A
LARM
G
ENERATION EGISTER (AGR)
R
HEX ADDRESS: 0X0108
B
IT
F
YEL(1)
YEL(0)
UNCTION
T
YPE
D
EFAULT
DESCRIPTION-OPERATION
5
R/W
R/W
0
0
Yellow Alarm and Multiframe Yellow Alarm Generation
These bits activate and deactivate the transmission of a yellow alarm.
The Yellow alarm and multiframe Yellow alarm data pattern can be
injected either automatically upon detection of the loss of alignment or
controlled by YEL bits. Setting these bits to b01 will enable automatic
yellow alarm transmission in response to a loss of frame alignment
(FAS red alarm) and multiframe yellow alarm is transmitted in response
to a loss of multiframe alignment (CAS red alarm). The decoding of
these bits are explained as follows:
4
00 = Disable the transmission of yellow alarm.
01 = Enable automatic yellow alarm generation.
1. The yellow alarm bits (bit 3 of non-FAS frames in TS0) is transmitted
by echoing the receive FAS alignment status. Logic one is transmitted
if loss of FAS alignment occurred.
2. The multiframe yellow alarm bits (bit 6 of frame 0 in TS16) is trans-
mitted by echoing the receive CAS multiframe alignment status. Logic
one is transmitted if loss of CAS multiframe alignment occurred.
10 = Yellow and multiframe yellow alarms are transmitted as 0.
11 = Yellow and multiframe yellow alarms are transmitted as 1.
3
2
AISG(1)
AISG(0)
R/W
R/W
0
0
AIS Generation Select
These Read/Write bit-fields are used to configure the channel to gener-
ate and transmit an AIS pattern, as described below.
00 = No AIS Alarm generated
01 = Enable unframed AIS alarm generation
10 = Enable AIS16 generation
11 = Enable framed AIS alarm generation
1
0
AISD(1)
AISD(0)
R/W
R/W
0
0
AIS Pattern Detection Select
These Read/Write bit-fields are used to specify the type of AIS pattern
that the receive E1 framer block will detect as described below.
00 = AIS alarm detection is disabled.
01 = Enable unframed AIS alarm detection.
10 = Enable AIS 16 detection.
11 = Enable framed AIS alarm detection.
TABLE 17: ALARM
G
ENERATION
R
EGISTER -T1 MODE
R
EGISTER 8 - T1 MODE
A
LARM
G
ENERATION
R
EGISTER (AGR)
HEX ADDRESS: 0X0108
B
IT
FUNCTION
TYPE
D
EFAULT
DESCRIPTION-OPERATION
7
6
Reserved
LOF
-
-
Reserved
R/W
0
Loss of Frame Declaration Criteria
A Red Alarm is generated by the receiver to indicate the loss of frame
(LOF) alignment. A Yellow Alarm is then returned to the remote trans-
mitter to report that the receiver detects LOF. Setting this bit will set the
criteria for preventing red alarm from generation as long as the frame is
aligned. Otherwise, the frame and multiframe must be both aligned in
order to keep red alarm from happening.
42
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