Please unsubscribe me. Thank you. Bob Lee wrote:
> Subject: TBR 21- 60 mA max. loop current > > Hello all, > > I am brand new to this list.....so please be gentle 8-) > > My concern is the possible increased power dissipation re- > quired by the terminal equipment (TE) when connecting to > the EU PSTN. Assuming the worst case of: the test model > 50.0V (could even be higher in practice) battery and 230 > Ohm battery feed resistance, and short (co-located) loops, > this equates to 50.0 -.06A x 230 = 36.2V across the TE T,R > port. Now, since Ohms (not to mention Kirchhoff's) law has > yet to be repealed, results in a maximum per port power > dissipation of P(T,R) = 36.2V x .06A = 2.172 Watts! This > is about (in our case) 3x the heat dissipation that we ob- > serve when interfacing the North American 48V/460 Ohm battery > feed model. > > Has anybody out there also "taken the heat" 8-) and if so, > been able to defy Mr. Ohm and/or Mr. Kirchoff and somehow > dissipate less heat (and still meet TBR 21, of course)? > > Thank you...cool it...and.. > > cheers, > > bob lee > > -- X`
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