[VIP-281,VIP480,VIP880,VIP1680,VIP2480] FXO Busy Tone Manual Learning Function
Regarding this detail descriptions, it is suggested to download the product FAQ: ftp://ftp.planet.com.tw/VoIP and read the documentation for more understandings, thank you.
FAQ-Case42 [VIP-281,VIP480,VIP880,VIP1680,VIP2480] FXO Busy Tone Manual Learning Function.pdf
