... Echo Cancellation,compliance G.168,index 64ms l AGC l Support dynamic JITTER BUFFE Security l Embedded firewall module, packet filter ... , IP port shielding, anti URL attack Support signaling, media, fax encryption, anti-interference and sniffing, AES standard ... phone to phone calling or fax through internet and trunking gateway l support FXS and FXO 1:1 binding for 2 PSTN ...