MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 88

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

MT9074
Table 112 - Receive Multiframe Alignment Signal
88
7-4 RMAI1-4 Receive Multiframe Alignment Bits
1-0
Bit
7-0
3
2
Bit
Name
ID7-0 ID Number. Contains device code
X2, X3
Name
X1
Table 114 - Identification Word
Y
(Page 3, Address 1FH) (E1)
(Page 3, Address 19H) (E1)
10101111
One to Four. These bits are received
on the PCM30 2048 kbit/sec. link in
bit positions one to four of time slot
16 of frame zero of every signaling
multiframe. These bit should be 0000
for
alignment.
Receive Spare Bit X1. This bit is
received on the PCM30 2048 kbit/
sec. link in bit position five of time slot
16 of frame zero of every signaling
multiframe.
Receive Y-bit. This bit is received on
the PCM30 2048 kbit/sec. link in bit
position six of time slot 16 of frame
zero of every signaling 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
PCM30 2048 kbit/sec. link in bit
positions
respectively, of time slot 16 of frame
zero of every signaling multiframe.
Functional Description
proper
Functional Description
seven
signaling
and
multiframe
eight
Bit
7
6
5
4
3
2
MFALMS
AIS16S
AUXPS
Table 113 - Alarm Status Word 2
Name
LOSS
RAIS
AISS
(Page 3, Address 1BH) (E1)
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
indicates that a valid AIS signal
is not being received. The
criteria for AIS detection is
determined by the control bit
ASEL.
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
PCM30 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.
Functional Description
192
received.
Indication
Alarm
alignment
consecutive
Data Sheet
Indication
If
Status
frame
zero,
bit