What best describes an FXO interface？（）A、analog trunks that provide the Survivable Remote Site Telephony (SRST) feature B、analog trunks that provide VoIP gateway functionality C、analog trunks that connect a gateway to plain old telephone service (POTS) device such as analog phones, fax machines, and legacy voice-mail systems D、analog trunks that connect a gateway to a central office (CO) or private branch exchange (PBX)
What best describes an FXO interface？（）
- A、analog trunks that provide the Survivable Remote Site Telephony (SRST) feature
- B、analog trunks that provide VoIP gateway functionality
- C、analog trunks that connect a gateway to plain old telephone service (POTS) device such as analog phones, fax machines, and legacy voice-mail systems
- D、analog trunks that connect a gateway to a central office (CO) or private branch exchange (PBX)
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