The way I explain the difference between fxo and fxs, is electrically...
The telco lines, PROVIDES voltage and current to makes the telephone ring, so the FXO is a device, adapted to recive this voltage an current.
The phone, NEEDS voltage and current, to ring, so the FXS is a device, adapted to provide this voltage and current.
So, if you plug an FXS to a Telco Line, both equiments PROVIDE voltage and current, so... what you have? Sparks and a short cut, and at least like 75usd of the fxs module or even worst, like 100usd for iaxy or fxs card :(
Wolf Paul wrote:
Hello all,
as a relative newbie I obediently ordered the recently recommended "Newton's Telecom Dictionary" but it did not provide the answer to one of my question. Perhaps one of you can do so.
What is the difference in functionality between an FXO and an FXS port? I know that the line from telco goes into an FXO and standard POTS phone goes into an FXS, but since both types of ports must be able to both make and answer calls, what is the actual functional difference?
Or in other words, what does an FXO to FXS converter do (I have seen some mention but no explanation of those)?
Thanks.
Wolf Paul
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