Asus AX-145 Quick Installation Manual page 22

AX-125/145 SIP VoIP Router Quick Installation Guide
3.4.4 Codec
To set Codecs
1. From the menu, click VoIP -> Codec.
2. Configure these settings:
• Codecs: Select the voice codec type for the VoIP call function, AX-125/145
supports the most popular G.723 and G.729 low bit rate codec and its payload
setting. The basic time unit for 1 packet of G.723 is 30ms, for G.729 is 10ms.
You can adjust the packetization time to assign the payload size of each packet
frame.
• Prefer codec: Choose your preferred codec for SIP capability negotiation.
• Silence suppression: Enable/Disable the silence suppression function. If
set to "Enable", no packet is sent out when there are no voice/audio activities.
This function is useful when your internet access bandwidth is limited.
• Jitter Buffer: When the voice quality is bad, increasing this value increases
voice quality, but also delays voice transmission.
• DTMF method: AX-125/145 supports the most popular DTMF transferring
methods: RFC2833, Info, and in-band audio.
• RFC2833 payload value: Assign the payload value for RFC2833 DTMF
transferring.
• Regenerate DTMF: If enabled, the DTMF that receives from the network will
play on the phone set, otherwise, it will not play. This option is effective only
when you choose RFC2833 or Info in DTMF method.
3. When done, click Apply to save the Codec settings.
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