MH88628 Ver la hoja de datos (PDF) - Mitel Networks

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MH88628

Central Office SLIC

Mitel Networks 

MH88628

Preliminary Information

21

N2

MH88628 N1 20

19

NATT

33

NS

21

N2

MH88628

20

N1

19

NATT

33

NS

VDD

Network balance is set to the input

Impedance (Zin)

Note: Make connection between Z1 and other points as short as possible

Network balance is set to the AT&T compromise

network (350Ω + 1000Ω // 210nF)

impedance. The input impedance must be

set to 600W.

Figure 6 - Network Balance Setting with NETBAL equal to Zin or AT&T

21

N2

MH88628 N1 20

19

NATT

33

NS

VDD

10 x Zin

10 x

NETBAL

Notes:

1) The 10xZin network must be set to 10 x the desired input impedance (Zin).

2) The network balance must be set to the desired network balance. See

section on network balance.

3) Make connection between Z1 and component as short as possible.

10 x Zin

RP

N2

CP

N1

RS

1

[ ] ZNETBAL = 0.1 x RS + 1/RP + (S x CP)

where S = j x w

and w = 2 x Π x f

Example:

If RS = 2200Ω, RP = 8200Ω, CP= 11.5nf

Then the network balance impedance

(ZNETBAL) is 220Ω in series with 820Ω

in parallel with 115nF.

Figure 7 - Network Balance Setting with NETBAL not equal to Zin or AT&T

2-208

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