Dtmf Methods; Preferred Vocoder (Codec) - Grandstream Networks HT818 User Manual

DTMF Methods

The HT81X support the following DTMF mode:
• DTMF in-audio
• DTMF via RTP (RFC2833)
• DTMF via SIP INFO
Set priority of DTMF methods according to your preference. This setting should be based on your server
DTMF setting.

Preferred Vocoder (Codec)

The HT81X support following voice codecs. On Profile pages, choose the order of your favorite codecs:
• PCMU/A (or G711µ/a)
• G729 A/B
• G723.1
• G726
• iLBC
• OPUS
HT81x User Guide
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