SMC Networks Barricade SMC7908VoWBRA2 - Manual (Page 117)

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• PLC (Packet Loss Compensation): During the transmission of a
series of packets, if one of them is lost, then the device will use the
mathematical algorithm to calculate a value to make up the lost packet.
This function is designed to make the voice conversation more
smooth.
• Caller ID Mode: Check this box to use Dual Tone Multi-Frequency
(DTMF) to send out the caller ID.
• Inter Digit Delay: This is the delay time before processing each dialed
digit.
• Additional Ringing Mode: The ringing tone will sound when
incoming calls from FXO.
• T.38 Mode: This is the fax over UDP feature, which enables fax data
transmission (using the T.38 fax protocol) over UDP.