MH88625 Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
MH88625 Datasheet PDF : 16 Pages
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Preliminary Information
MH88625
Tables 1 & 2: Transmit and Receive Gain Programming
Transmit
Gain (dB)
RTX Resistor
Value (Ω)
Notes
+6.0
+4.0
+3.7
0.0
-3.0
-6.0
-12.0
No Resistor
38.3k
32.4k
GTX0 to GTX1
5.49k
3.32k
1.43k
Results in 0dB overall gain when used with Mitel A-law codec (i.e.
MT8965)
Results in 0dB overall gain when used with Mitel µ-law codec (i.e.
MT8964)
Receive Gain
(dB)
RRX Resistor
Value (Ω)
Notes
+6.0
0.0
-3.0
-3.7
-4.0
No Resistor
GRX0 to GRX1
5.49k
4.87k
4.64k
Results in 0dB overall gain when used with Mitel A-law codec (i.e.
MT8965)
Results in 0dB overall gain when used with Mitel µ-law codec (i.e.
MT8964)
-6.0
3.32k
-12.0
1.43k
Note 1: See Figures 3 and 4 for additional details.
Note 2: Overall gain refers to the receive path of PCM to 2-wire, and transmit path of 2-wire to PCM.
Table 3: Input Impedance Settings
Z2
Z1
Z600
Z900
Resulting input impedance (Zin)
NA
Connect Z1 to Z600
NA
600Ω
NA
Connect Z1 to
Z900
NA
Connect Z1 to
Z900
900Ω
Connect network from Z1 to Z2
NA
NA
0.1 x impedance between Z1 & Z2
Note 1: NA indicates high impedance (10kΩ) connection to this pin does not effect the resulting network balance.
Note 2: See Figure 4 & 5 for Applications Circuits.
Table 4: Network Balance Settings.
NS (Input)
N2
Low
NA
High
NA
N1
NATT
NA
NA
Connect N1 to NATT
High
Connect network from N1 to
NA
AGND equivalent to 10 x
NETBAL. Connect network
from N1 to N2 equivalent to 10
x Zin.
Resulting input impedance (Zin)
Equivalent to Zin
AT&T compromise (350Ω + 1kΩ //
210nF)
Zin must be 600Ω
0.1 x impedance between N1 & N2
Note 1: NA indicates high impedance (10kΩ) connection to this pin does not effect the resulting network balance.
Note 2:Low indicates Logic Low.
Note 3: See Figures 6 and 7 for Application Circuit.
2-193
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