Gigaset IP Phone Configuration Guide
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4. Configuring the Codecs
Go to the menu (Telephony>Audio&Video), and select the codecs needed.
For audio codecs, you can keep the default settings.
Figure - Audio Codecs Settings
For video codecs, it’s recommended to use the H.264. On MyPBX, please go to the
menu (PBX>Advanced Settings>SIP Settings>Codecs), and select the H.264 as the
only video codec.