- Call2Teams provides an option in the portal to filter on the Codecs. Note that this is a restrictive filter, so codecs that are missing will not be added in. When you select the codecs here you can also order them in preference, which will then be reflected in the SDP.
Example where the call dropped to "488 Not Acceptable Here" from Call2Teams is where the DTMF was negotiated in the original Invite (SDP) and the Re-Invite(SDP) had no DTMF negotiated hence, forcing Call2Teams to drop the call
Invite SDP with DTMF negotiation
Re-Invite SDP without DTMF negotiation
Confirm if you expect to send and receive calls to the Call2Teams platform using media encryption. If so, enable this in the PBX/Trunk settings page: