Preliminary Information
MT9075B
Bit
Name
Functional Description
Bit
Name
Functional Description
Unused.
7
BPVE Bipolar Violation Error Insertion.
7-3
2
--
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.
(0)
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
(criteria as per LLOS status bit on
page 03H address 18H). If low, pin
LOS will go high when either a loss
of signal (LLOST =1) or a loss of
basic frame alignment state exits
(bit SYNC on page 03H address
10H is zero).
(0)
6
5
CRCE 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.
(0)
FASE 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.
1
ADSEQ Digital Milliwatt or Digital Test
(0)
Sequence. If one, the A-law digital
milliwatt analog test sequence will
be selected by the Per Time Slot
Control bits TTST and RTST (on
page 07H and 08H). If zero, the
(0)
15
PRBS 2 -1 bit error rate test
4
NFSE Non-frame
Alignment
Signal
sequence will be selected by the
Per Time Slot Control bits TTST and
RTST. The PRBS generator is reset
whenever this bit is set to 1.
Error Insertion.
A
zero-to-one
(0)
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.
0
GCI/ST GCI or ST-BUS Frame Pulse. If
one, the MT9075B will transmit or
receive a GCI frame pulse on pin
F0b (pin 46 in PLCC, 34 in MQFP).
If zero, the MT9075B will transmit or
receive an ST-BUS frame pulse on
F0b.
(0)
3
2
LOSE Loss of Signal Error Insertion. If
one, the MT9075B transmits an all
zeros signal (no pulses) in every
PCM 30 time slot. If zero, data is
transmitted normally.
(0)
Table 29 - Access Control Word
(Page 02H, Address 13H)
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.
(0)
1
0
---
Unused.
DBNCE Debounce Select. This bit selects
the debounce period (1 for 14
msec.; 0 for no debounce). Note:
there may be as much as 2 msec.
added to this duration because the
state change of the signalling
equipment is not synchronous with
the PCM 30 signalling multiframe.
(0)
Table 28 - Error and Debounce Selection Word
(Page 02H, Address 10H)
39
MITEL [ MITEL NETWORKS CORPORATION ]
