[asterisk-users] USB dahdi fxo ?
ewieling at nyigc.com
Sat Dec 14 15:06:21 CST 2019
People make it overly complicated.
Things which provide dialtone are plugged into FXO ports.
PBX analog extensions
Things which expect to be provided with dialtone are plugged into FXS ports.
FXO ports can handle the 90 volt ring singnal
FXS ports often get destroyed by a 90 volt ring signal
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