... ,ensure the speech high quality 3,support VLAN and QoS 4,support G.711, G.729A/B, ... and IP layers and comprehensive jitter buffer VLAN and QoS support NAT Transversal and Router functionsVoice prompts, HTTP Web, Auto Provision support for configuration and ... provisioning server)On line firmware upgradeMulti-language support: English and Chinese Hardware SpecificationsProcessor: ARM9E 133MHz DSP: ...