Advance Information
MT9074
Bit
Name
Functional Description
Bit
Name
Functional Description
7
CRCS1 Receive CRC Error Status One.
If one, the evaluation of the last
received submultiframe 1 resulted
in an error. If zero, the last
submultiframe 1 was error free.
Updated on a submultiframe 1
basis.
7
SYNC Receive Basic Frame Alignment.
SYNC indicates the basic frame
alignment status (1 - loss; 0 -
acquired).
6
5
MFSYNC Receive Multiframe Alignment.
MFSYNC indicates the multiframe
alignment status (1 - loss; 0 -
acquired).
6
5
CRCS2 Receive CRC Error Status Two.
If one, the evaluation of the last
received submultiframe 2 resulted
in an error. If zero, the last
submultiframe 2 was error free.
Updated on a submultiframe 2
basis.
CRCSYN Receive CRC-4 Synchronization.
CRCSYN indicates the CRC-4
multiframe alignment status (1 -
loss; 0 - acquired).
4
3
2
REB1 Receive E-Bit One Status. REB1
indicates the status of the received
E1 bit of the last multiframe.
RFAIL
Remote
CRC-4
Multiframe
Generator/Detector Failure. If
one, then each of the previous five
seconds have an E-bit error count
of greater than 989, and for this
same period the receive RAI bit
was zero (no remote alarm), and
for the same period the SYNC bit
was equal to zero (basic frame
alignment has been maintained). If
zero, indicates normal operation.
REB2 Receive E-Bit Two Status. REB2
indicates the status of the received
E2 bit of the last multiframe.
CRCRF CRC-4 Reframe. A one indicates
that the receive CRC-4 multiframe
synchronization could not be found
within the time out period of 8 msec.
after
detecting
basic
frame
4
LOSS
Loss of Signal Status. If one,
indicates the presence of a loss of
signal condition. If zero, indicates
normal operation. A loss of signal
condition occurs when 192
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 192 contiguous
pulse positions starting with a
pulse.
synchronization. This will force a
reframe when the maintenance
option is selected and automatic
CRC-4 interworking is de-selected.
1
0
RED
RED Alarm. RED goes high when
basic frame alignment has been lost
for at least 100 msec. This bit will be
low when basic frame alignment is
acquired (I.431).
CRCIWK CRC-4 Interworking. CRCIWK
indicates the CRC-4 interworking
status (1 - CRC-to-CRC; 0 - CRC-
to-non-CRC).
3
2
AIS16S Alarm Indication Signal 16
Status. If one, indicates an all
ones alarm is being received in
channel 16. If zero, normal
operation. Updated on a frame
basis.
Table 103 - Synchronization Status Word
(Page 3, Address 10H) (E1)
AISS
Alarm
Indication
Status
Signal. If one, indicates that a
valid AIS or all ones signal is
being received. If zero, indicates
that a valid AIS signal is not being
received. The criteria for AIS
detection is determined by the
control bit ASEL.
Table 104 - Alarm Status Word 1
(Page 3, Address 11H) (continued) (E1)
83
MITEL [ MITEL NETWORKS CORPORATION ]
