... /asynchronous interface cards, ADSL2+/G.SHDSL interface cards, FXS/FXO voice cards, ISDN interface cards, CPOS interface cards and ... client, NAT, Sub interface managementVoiceRTP, SIP, SIP AG, IP PBX/TDM PBX, FXO/FXS, VoIP/conference call3GCDMA 2000 EV-DO Rev ... and traffic policy), HQoS, FR QoSVoiceRTP, SIP, SIP AG, IP PBX/TDM PBX, FXO/FXS, VoIP/conference callSecurityACL, firewall, 802.1x ...