... offers best performance and cost reduction. By online firmware upgrade, latest VoIP functions and standard can be ... forwarding, call transfer, call forking, hotline, CRBT, do not disturb, speed dialing, busy tone detection, 3-way ... filter, port number changing, traffic shapingConfiguration/ManagementWeb GUIConfiguration, firmware upgrade, status monitoring, log downloadingEMSTR069/TR104/TR106, SNMPv2, ...