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Basic Function ● Remote and centralized management of SIM cards ● No need to switch and recharge SIM cards on-site ● Hot swap of SIM cards without powering off the SMB32 ● Free DDNS service to support dynamic public IP ● Management of 32 SIM cards in standalone mode. ● Free SIM Server for management of over 10,000 SIM cards ● Counter measures for the techniques used for SIM card blocking ● Online firmware upgrade Key Features: ● Open Standard VoIP Protocols (ITU H.323 V4 and IETF SIP V2) ● Single or Multiple Server Registrations ● Two 10/100 Ethernet for WAN / LAN connections ● GSM module for making GSM calls ● Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer ● VLAN and QoS support ● NAT Transversal and Router functions ● Voice prompts, HTTP Web, Auto Provision support for configuration and updates ● Highly stable embedded Linux operating system in high performance ARM 9 Processor Enhanced Features ● Dynamic selection of codec ● Advanced jitter buffer ● Automatic traversal of NAT and firewall ● VLAN / Qos ● Router ● Echo cancellation for Speakerphone ● Comfort noise generation (CNG) ● Voice activity detection (VAD) ● Auto provisioning (requires auto provisioning server) ● On line firmware upgrade ● Multi-language support: English and Chinese