
6
Voice Interface: FXO
An FXO interface is like the port on a standard telephone
An FXO interface can be used to connect PBX’s extension or PSTN
Receive/Transport calls from and to a PBX or PSTN (Public Switched
Telephone Network)
Requires a dial tone, ring indication, and call progress indicators that
are provided from PBX or PSTN switch
Automate the operations (on-hook, off-hook) that are done manually
on a standard telephone
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