... 2* Ports:4 LAN,4 Gbit,2 FXS 3* 11n 300Mbps 4* Supports ITU-T G.984 ... Physical Media Dependent (PMD) layer specifications- G.984.3 Transmission convergence layer specifications- G.984.4 Management and ... (Voice Activity Detection)- Silence Suppression- CNG (Comfort Noise Generation)- Codec: G.711, G.723.1, G.726, ... G.722, G.722.2- DTMF Detection and Generation- Multiple SIP Numbers Support- T.38 Fax Relay ...