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- Oct 12, 2011
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I have configured a GrandStream Handytone-488; POTS (FXO) works fine, and the FXS port on it can call other extensions. Problem is, if I dial on the outside line from the FXS, I get a busy tone returned. I tried using # to send and then taking it out; nothing. I know my routing is correct for PSTN because I can do it from any phone (iPhone, softphone) without any problem.
Also, will the FXS port always ring no matter what?
Also, will the FXS port always ring no matter what?