MT9074
Advance Information
Bit
Name
Functional Description
Bit Name
Functional Description
1
RAIS
Remote Alarm Indication Status.
If one, there is currently a remote
alarm condition (i.e., received A bit
is one). If zero, normal operation.
Updated on a non-frame alignment
frame basis.
7
1SEC One Second Timer Status. This bit
changes state once every 0.5 second
and is synchronous with the 2SEC
timer.
6
5
2SEC Two Second Timer Status. This bit
changes state once every second and
is synchronous with the 1SEC timer.
0
RCRS
RAI and Continuous CRC Error
Status. If one, there is currently an
RAI and continuous CRC error
400T 400 msec. Timer Status. This bit
changes state when the 400 msec.
CRC-4 multiframe alignment timer
expires.
condition.
operation.
If
zero,
normal
on
Updated
a
multiframe basis.
Table 104 - Alarm Status Word 1
(Page 3, Address 11H) (continued) (E1)
--
4
3
Unused.
CALN CRC-4 Alignment. This bit changes
state every msec. When CRC-4
multiframe
alignment
has
been
achieved state changes of this bit are
synchronous with the receive CRC-4
synchronization signal.
2
1
KLVE Keep Alive. This bit is high when the
AIS status bit has been high for at least
100msec. This bit will be low when AIS
goes low (I.431).
T1
Timer One. This bit will be high upon
loss of terminal frame synchronization
persisting for 100 msec. This bit shall
be low when T2 becomes high. Refer
to I.431 Section 5.9.2.2.3.
0
T2
Timer Two. This bit will be high when
the MT9074 acquires terminal frame
synchronization persisting for 10 msec.
This bit shall be low when non-normal
operational frames are received. I.431
Section 5.9.2.2.3.
Table 105 - Timer Status Word
(Page 3, Address 12H) (E1)
84
MITEL [ MITEL NETWORKS CORPORATION ]
