Advance Information
MT9074
Bit
Name
Functional Description
Bit
Name
Functional Description
5
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.
7-4 RMAI1-4 Receive Multiframe Alignment Bits
One to Four. These bits are received
on the PCM 30 2048 kbit/sec. link in
bit positions one to four of time slot
16 of frame zero of every signalling
multiframe. These bit should be 0000
for proper signalling multiframe
alignment.
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.
3
X1
Receive Spare Bit X1. This bit is
received on the PCM 30 2048 kbit/
sec. link in bit position five of time slot
16 of frame zero of every signalling
multiframe.
2
Y
Receive Y-bit. This bit is received on
the PCM 30 2048 kbit/sec. link in bit
position six of time slot 16 of frame
zero of every signalling multiframe.
The Y bit may indicate loss of
multiframe alignment at the remote
end (1 -loss of multiframe alignment;
0 - multiframe alignment acquired).
3
AUXPS Auxiliary Pattern Status. This
bit goes high when a continuous
101010... bit stream (Auxiliary
Pattern) is received on the PCM
30 link for a period of at least 512
bits. If zero, auxiliary pattern is
not being received. This pattern
will be decoded in the presence
of a bit error rate of as much as
10-3.
1-0
X2, X3 Receive Spare Bits X2 and X3.
These bits are received on the PCM
30 2048 kbit/sec. link in bit positions
seven and eight respectively, of time
slot 16 of frame zero of every
signalling multiframe.
2
1
0
MFALMS Multiframe Alarm Status. This
bit goes high in the event of
receipt of a multiframe alarm. It
goes low when the received
multiframe alarm bit goes low.
Table 112 - Receive Multiframe Alignment Signal
(Page 3, Address 19H) (E1)
RSLIPS
Receive Slip Status. A change
of state (i.e., 1-to-0 or 0-to-1)
Bit
Name
Functional Description
indicates
controlled
occurred.
that
frame
a
receive
slip has
7
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
- - -
Unused.
Table 113 - Alarm Status Word 2
(Page 3, Address 1BH) (E1)
non-frame
basis.
alignment
frame
6
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.
Bit Name
Functional Description
7-0 ID7-0 ID Number. Contains device code
10101111
Table 114 - Identification Word
(Page 3, Address 1FH) (E1)
Table 113 - Alarm Status Word 2
(Page 3, Address 1BH) (E1)
87
MITEL [ MITEL NETWORKS CORPORATION ]
