mt9072av2 Zarlink Semiconductor, mt9072av2 Datasheet - Page 185

• Manufacturer Part Number: mt9072av2
• Description: Octal T1/e1/j1 Framer
• Manufacturer: Zarlink Semiconductor

15-14
Bit
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RMA1
RMA2
RMA3
RMA4
Name
LOSS
AIS16
AUXP
KLVE
RAI
AIS
X1
X2
X3
##
Y
Table 155 - Alarms & Multiframe Signaling (MAS) Status (R Address Y12) (E1)
not used.
Keep Alive. If one, indicates that the AIS status bit (register address Y12) has been one for at
least 100 ms. This bit is zero when AIS is zero. Refer to I.431.
Loss of Signal Status Indication. If one, indicates the presence of a loss of signal condition
on the received PCM30 link. A loss of signal condition occurs when 192 or 32 (selectable by
L32Z in Y01) consecutive bit periods are zero. A loss of signal condition terminates when an
average ones density of at least 12.5% has been received over a period of 255 contiguous
pulse positions starting with a pulse. If zero, indicates normal operation.
Alarm Indication Signal 16 Status. If one, indicates an all ones signal (1111 1111) is being
received in timeslot16 of the received PCM30 link for the current frame. Updated on a basic
frame basis. If zero, normal operation.
Alarm Indication Status Signal. If one, indicates that an Alarm Indication Signal (AIS) is
detected on the received PCM30 link. The criteria (i.e., less than three zeros in a two frame
period) for AIS detection is determined by the control bit ASEL (register address Y00). If the
AIS bit is zero, indicates that an AIS signal not being received.
Remote Alarm Indication Status. Indicates the status of the bit (A-bit) received on the
PCM30 link in bit position 3 of timeslot 0 of the non-frame alignment signal (NFAS) frames. If
one, there is currently a remote alarm condition. Updated on a NFAS frame basis.
This bit is identical to the RAI bit of register address Y13 and is duplicated here for
convenience.
Auxiliary Pattern. If one, an auxiliary pattern (101010) of at least 512 bits is being received
on the PCM30 link. If zero, an auxiliary pattern is not being received. This pattern will be
decoded in the presents of a bit error rate of as much as 10
Receive Multiframe Alignment Bits One to Four. Indicates the status of the bits received on
the PCM30 link in bit positions one to four of timeslot 16 of frame 0 of the multiframe
alignment signal (MAS). These bits should be 0000 for proper signaling multiframe alignment.
Updated on a MAS frame basis.
Receive Spare Bit X1. Indicates the status of the bit received on the PCM30 link in bit
position five of timeslot 16 of frame 0 of the multiframe alignment signal (MAS). Updated on a
MAS frame basis.
Receive Y-bit. Indicates the status of the bit (Y-bit) received on the PCM30 link in bit position
six of timeslot 16 of frame 0 of the multiframe alignment signal (MAS). Updated on a MAS
frame basis. If one, typically indicates a loss of multiframe alignment at the remote end. If
zero, typically indicates acquired multiframe alignment at the remote end.
Receive Spare Bits X2 and X3. Indicates the status of the bits received on the PCM30 link in
bit positions seven and eight of timeslot 16 of frame 0 of the multiframe alignment signal
(MAS). Updated on a MAS frame basis.
Zarlink Semiconductor Inc.
MT9072
Functional Description
185
-3
.
Data Sheet