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Knowledgebase : Support > SIP Trunks > 3CX
Orbtalk has many users succesfully using 3CX. Orbtalk supports G711U, G711A, G729 (including annex B), GSM, iLBC and SPEEX. DTMF is also transmitted through our switch, test first with inband and DTMF via SIP INFO on the device.The below article is from t...
3CX sipgw3
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