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