... : G.168- VAD (Voice Activity Detection)- Silence Suppression- CNG (Comfort Noise Generation)- Codec: G.711, G.723.1, G.726, G ... (Unconditional/Busy/No Answer)- Call Transferring- Three Way Conference- Call Block- DND (Do Not Disturb)- MWI- Call Barring- Anonymous Call Blocking ... , 2000, ME, XP, NT, Vista, 7- Macintosh- Linux GPON ONT device KF562