... : G.168, 64ms echo tailDynamic jitter buffer, Voice activity detection (VAD), Packet loss compensationQoS: IP ... TOSCall FeatureCalling typeVoice/Fax/DataIVR voice promptFXO port 2-stage dialingEncryptionRC4 and other encryption ... Transparent audioBillingRADIUS Interface; Polarity ReverseUser FeatureCaller ID, Call forward, Call transfer, Call fork, Hot line, Fashion ring, No ...