MT9074
Advance Information
Bit
Name
Functional Description
Bit
Name
Functional Description
4-0
Sa4-
Sa8
A one selects the corresponding
Sa bits of the NFA signal for 4, 8,
12, 16 or 20 kbits/sec. data link
channel. Data link (DL) selection
will function in termination mode
only; in transmit transparent mode
Sa4 is automatically selected - see
TxTRSP control bit of page 01H,
address 11H. If zero, the
corresponding bits of transmit non-
frame alignment signal are
programmed by the Non-Frame
Alignment Control Word (page
01H, address 16H).
4
NFSE
Non-frame Alignment Signal
Error Insertion. A zero to one
transition of this bit inserts a single
error into bit two of the time slot
zero non-frame alignment signal of
the transmit PCM 30 data. A one,
zero, or one to zero transition has
no function.
3
2
LOSE
Loss of Signal Error Insertion. If
one, the MT9074 transmits an all
zeros signal (no pulses) in every
PCM 30 time slot. When HDB3
encoding is activated no violations
are transmitted. If zero, data is
transmitted normally.
Table 86 - Multiframe and Data Link Selection
(E1)
PERR
Payload Error Insertion. A zero
to one transition of this bit inserts a
single error in the transmit
payload. A one, zero, or one to
zero transition has no function.
(Page 1, Address 17H)
Bit Name
Functional Description
7-0 TxM7-0 Transmit Message Bits 7 - 0. The
contents of this register are transmit
into those outgoing DS1 channels
selected by the Per Time Slot Control
registers.
1
0
- - -
Unused
LOS/
LOF
Loss of Signal or Loss of Frame
Selection. If one, pin LOS (pin 61
in PLCC, 57 in MQFP) will go high
when a loss of signal state exits. A
loss of signal is defined as either
receipt of a signal attenuated
below the analog loss of signal
threshold (selectable as 20 dB or
40 dB below nominal) or receipt
of 192 consecutive 0’s. If low, pin
LOS will go high when either a
loss of signal or a loss of basic
frame alignment state exits (bit
SYNC on page 03H address 10H
is zero).
Table 87 - Transmit Message Word (E1)
(Page 1, Address 18H)
Bit
Name
Functional Description
7
BPVE
Bipolar
Violation
Error
Insertion. A zero to one transition
of this bit inserts a single bipolar
violation error into the transmit
PCM 30 data. A one, zero or one
to zero transition has no function.
Table 88 - Error Insertion Word (E1)
(Page 1, Address 19H)
6
5
CRCE
FASE
CRC-4 Error Insertion. A zero to
one transition of this bit inserts a
single CRC-4 error into the
transmit PCM 30 data. A one,
zero, or one to zero transition has
no function.
Frame Alignment Signal Error
Insertion. A zero to one transition
of this bit inserts a single error into
the time slot zero frame alignment
signal of the transmit PCM 30
data. A one, zero, or one to zero
transition has no function.
Table 88 - Error Insertion Word (E1)
(Page 1, Address 19H)
74
MITEL [ MITEL NETWORKS CORPORATION ]
