The Media Server supports clients connecting from remote NATed networks, using the same algorithms as those employed with the Media Proxy component. When a call media is terminated with the CommuniGate Pro Media Server, there is no need to build a Media Proxy to handle media transfer over a remote NAT.
The Media Server supports DTMF "codecs": if the peer announces support for such a codec, the Media Server detects audio packets sent using that codec and interprets the packet content as DTMF symbols. The Media Server can also send DTMF symbols using special DTMF "codecs". If the peer does not announce support for a DTMF "codec", the Media Server detects DTMF symbols sent "in-band", analyzing the audio data received.