Are Service Provider still having issues with Codec Mismatch? i.e. Company A is using G.711 calls Company B using G.729 - Company B only accept G.729 calls only, are Service Provider have capability to match the codecs?

1. General FreeSBC Features & Capabilities
1

Yes, we see codec mismatch as an issue. Some service providers accept it and others not. You can add transcoding devices to match the various codecs.