MT8931C
VDD
VDD
LTx
VDD
C1
MT8931C
D5
D6
D1
T1
1
2
3
4
5
6
K1
L1
VDD
D2
6
7
5
4
Tx+
Tx-
R2
R3
+
C2
C3
VBias
T2
9
2
1
Rx-
Rx+
3
2
1
6
5
4
VDD
10
D3
R1
Parts List:
C1, 3 = 0.1µF Ceramic
C2 = 10µF Tantalum
C4 = 22pF
LRx
VSS
K1
C4
D4
D1-4 = IN914
VDD
K1
D5, 6 = IN270 Germanium or
MBD301 Schottky
D7 = IN4003
K1 = 2 Form A or C Relay
(Aromat TQ2E-5V)
L1 = VAC N4025-X034
R1 = 3k01 1%
D7
R2,3 = 100Ω 1%
T1, 2 = VAC T60403-L4096-
X027 or VAC T60403-L4096-
X028
Figure 21 - ETS 300-012 NT & TE Line Interface for VAC X027 or X028
VDD
VDD
VDD
C1
MT8931C
D5
D6
D1
T1
6
1
4
LTx
K1
3
5
L1
VDD
D2
6
7
5
4
Tx+
Tx-
2
2
R2
R3
+
C2
C3
VBias
9
2
1
T2
Rx-
Rx+
1
6
VDD
10
5
3
D3
R1
Parts List:
4
C1, 3 = 0.1µF Ceramic
C2 = 10µF Tantalum
C4 = 22pF
LRx
VSS
K1
C4
D4
D1-4 = IN914
VDD
K1
D5, 6 = IN270 Germanium or
MBD301 Schottky
D7 = IN4003
K1 = 2 Form A or C Relay
(Aromat TQ2E-5V)
L1 = VAC N4025-X034
R1 = 3k01 1%
D7
R2,3 = 100Ω 1%
T1, 2 = VAC T60403-L4096-
X029 or VAC T60403-L4096-
X030
Figure 22 - ETS 300-012 NT & TE Line Interface for VAC X029 or X030
9-99
MITEL [ MITEL NETWORKS CORPORATION ]
