Akuvox R26C - SIP Account Management; Basic SIP Account Settings; Primary SIP Server Configuration; Secondary SIP Server Configuration

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8.4.2.Upload Open Door Tone
You can customize the door open tone if you need. The outside tone is used to
open door via card or DTMF. The inside tone is used to open door via triggered
input interface. Please follow the prompt about the file size and format. Path:
Phone > Audio > Tone Upload.
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