MT9076
Preliminary Information
Bit
Name
Functional Description
7
NRZ
NRZ Format Selection. Only used in the digital framer only mode (LIU is disabled). A one
sets the MT9076 to accept a unipolar NRZ format input stream on RxA as the line input,
and to transmit a unipolar NRZ format stream on TxB. A zero causes the MT9076 to accept
a complementary pair of dual rail inputs on RxA/RxB and to transmit a complementary pair
of dual rail outputs on TxA/TxB.
6
5
- - -
Reserved. Set this low for normal operation.
Res
Resistor. Set this bit high to connect a 104 ohm internal resistor between RTIP and
RRING. This is activated where an external 20.8 ohm terminating resistor is in use on a T1
line.
4 - 3
2 - 0
RxA1-0
Automatic Receive Equalizer Control. If both bits are set high, the receive equalizer is
turned on and will compensate for loop length automatically. The control bits RxEQ2-0 will
be ignored. If both are set low (00) then equalization will be actived using the control bits
RxEQ2-0.
RxEQ2-0 Receive Equalization Select. Setting these pins forces a level of equalization of the
incoming line data.
RES2 RES1 RES0 Receive Equalization
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
none
8 dB
16 dB
24 dB
32dB
40 dB
48 dB
reserved
These settings have no effect if either of RxA1 and RxA0 are set to one.
Table 35 - LIU Receiver Word (T1)
(Page 1, Address 1FH)
68
MITEL [ MITEL NETWORKS CORPORATION ]
