Zyxel X6004 Manual Del Usuario página 6

ENGLISH
2 Extension Slots
This section shows you how to install the FXS, FXO and ISDN (BRI, PRI) interface cards in
the X6004.
FXS
PSTN
FXO
PSTN
FXO/FXS
ISDN
BRI
PRI
ISDN
FXS Interface Cards - The FXS interface cards connect analog phones to the X6004. The
FXS interface cards provide line voltage.
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