參數(shù)資料
型號： MT9074
廠商： Mitel Networks Corporation
英文描述： T1/E1/J1 Single Chip Transceiver
中文描述： T1/E1/J1收發(fā)單芯片收發(fā)器
文件頁數(shù)： 45/122頁
文件大小： 372K
代理商： MT9074
Advance Information
MT9074
45
1
JTS
Japan
nization
. Setting this bit forces the
inclusion of Sbits in the CRC-6
calculation.
Telecom
Synchro-
0
H1R64
HDLC1 Rate Select
. Setting this
pin high while HDLC1 is activated
enables 64 Kb/s operation of the
data link on channel 24. Setting
this pin low while HDLC1 is
activated
enables
operation on channel 24 (this
prevents data corruption due to
forced bit stuffing).
56
Kb/s
Bit
Name
Functional Description
7 - 0 BIOMTx7-0
Transmit
Bit
Oriented
Message
. The contents of this
register are concatenated with a
sequence of eight 1’s and
continuously transmit in the FDL
bit position of ESF trunks.
Normally the leading bit (bit 7)
and last bit (bit 0) of this register
are set to zero.
Table 24 - Transmit Bit Oriented Message (T1)
(Page 1, Address 13H)
Bit
Name
Functional Description
Table 23 - Data Link Control Word (T1)
(Page 1, Address 12H)
Bit
Name
Functional Description
7
DSToEn
DSTo Enable
. If zero pin DSTo is
tristate. If set the pin DSTo is
enabled.
6
CSToEn
CSTo Enable
. If zero pin CSTo is
tristate. If set the pin CSTo is
enabled.
5
RBEn
Robbed Bit Signalling Enable
.
Setting this bit multiplexes the AB
or ABCD signalling bits into bit
position 8 of all DS0 channels
every 6th frame.
4
DBEn
Debounce Enable
. Setting this
bit causes incoming signalling bits
to be debounced for a period of 6
to 9 milliseconds before reporting
on CSTo or in the Receive
Signalling Bits Page.
3
MSN
Most Significant Nibble
. If set to
one the most significant nibble of
CSTi and CSTo are activated.
The
reporting
contains signalling information
for the equivalent channel in the
most significant nibble, and least
significant nibble is tristate. If set
to zero the least significant nibble
is active for CSTi and CSTo and
the most significant nibble of
CSTo is tristate.
stream
CSTo
2-1
SM1-0
Signalling Message
. These two
bits are used to fill the vacant bit
positions available on CSTo when
the MT9074 is operating on a D4
trunk. The first two bits of each
reporting nibble of CSTo contain
the AB signalling bits. The last
two contain SM1 and SM0 (in that
order). When the MT9074 is
connected to ESF trunks four
signalling
bits
reported and bits SM1-0 become
unused.
(ABCD)
are
0
JYEL
Japan Yellow Alarm
. Set this bit
high to select a pattern of 16 ones
(1111111111111111) as the ESF
yellow alarm, both for the case
when and ESF yellow alarm is to
be transmitted or in recognizing a
received yellow alarm.
Table 25 - Signalling Control Word (T1)
(Page 1, Address 14H)
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