MT9074
Name
TX2-0
Functional Description
Advance Information
Transmit pulse amplitude.
Select the TX2 –TX0 bits according to the line type, value of
termination resistors (RT), and transformer turns ratio used
RT(
Ω
)
Transformer Ratio
TX2 TX1 TX0 Line Impedance(
Ω
)
0 0 0
120
0
1:2
0 0 1
120
0
1:1
0 1 0
120
15
1:2
0 1 1
120 / 75
12.1
1:2
1 0 0
75
0
1:2
1 0 1
75
0
1:1
1 1 1
75
9.1
1:2
1 1 1
75 / 120
12.1
1:2
After reset these bits are zero.
Table 2 -Transmit Pulse Amplitude (E1)
Tx
0.68uF
TTIP
R
T
1:2
Fuse
R
T
TRING
+5V
Fuse
R
T
: Termination resis-
tor. Please check Table
2 for specific resistor
values.
1:1
RTIP
Fuse
120
Ω /
75 Ω
RRING
Fuse
Rx
Figure 6 - Analog Line Interface (E1)
10
MITEL [ MITEL NETWORKS CORPORATION ]
