MT9074 Mitel Networks Corporation, MT9074 Datasheet - Page 87

• Manufacturer Part Number: MT9074
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Mitel Networks Corporation

Table 112 - Receive Multiframe Alignment Signal
Advance Information
Bit
7-4
1-0
3
2
Bit
7
6
RMAI1-4 Receive Multiframe Alignment Bits
X2, X3
Name
Table 113 - Alarm Status Word 2
Name
X1
RAIS
AISS
Y
(Page 3, Address 1BH) (E1)
(Page 3, Address 19H) (E1)
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
alignment.
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.
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).
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.
Remote
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
basis.
Alarm
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.
proper
Functional Description
Functional Description
Indication
signalling
Alarm
alignment
Indication
multiframe
Status
frame
7-0
Bit
Bit
5
4
3
2
1
0
Name
ID7-0 ID Number. Contains device code
MFALMS
RSLIPS
AIS16S
AUXPS
Table 113 - Alarm Status Word 2
Name
LOSS
Table 114 - Identification Word
- - -
(Page 3, Address 1BH) (E1)
(Page 3, Address 1FH) (E1)
10101111
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.
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
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.
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.
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.
Receive Slip Status. A change
of state (i.e., 1-to-0 or 0-to-1)
indicates
controlled
occurred.
Unused.
Functional Description
Functional Description
192
that
frame
consecutive
MT9074
a
slip
receive
has
bit
87