MF604F datasheet(7/12 Pages) ETC1

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Product Specification

MF604F

Data sheet subject to change without notice

RDPS-MF050(R0)08/27/2002

SHEET 7 OF 12

4.3.

DC characteristic :

All requirement of this specification can be met in the presence of all POTS loop currents

from 0mA to 125mA. This in line filter can pass POTS tip-to-ring dc voltages of 0V to 78V

and ringing signals of 35Vrms to 75Vrms at any frequency from17Hz and25Hz with a dc

component in the range from 0V to 78V. The dc resistance from tip-to-ring at the line port

interface with the phone interface shorted, shall be less than or equal to 25 ohms. The DC

resistance from tip-to-ground and from ring-to-ground at the POTS interface with the U-R

interface open shall be greater than or equal to 5 Megohms. The ground point shall be local

building or green wire ground. As an objective , the dc resistance should exceed 25M

Ω.

4.4. Z

ADSL Definition:

To facilitate testing of the In-Line Filter independently of the actual modem or specific

vendor, Z

ADSL, is defined to allow proper termination of the ADSL port during voice band

testing. The Z

ADSL is valid only for voice band frequency. The combination of capacitors in

the Z

ADSL is only representative. The input shall be 27nF however derived. ZADSL equivalent

circuit is shown below.

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