Support DIGEST authentication and encryption using MD5 and MD5-sess.

Provide easy configuration thru manual operation (phone keypad and Web interface) or personalized automated provisioning via central configuration file for mass deployment.

Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)

NAT-friendly remote software upgrade capability (via tftp) even from behind firewalls/NATs.

Support for fail-over SIP server and DNS server (pending)

6.Grandstream BudgeTone 102

Features Include:

Two RJ45 10Base-T Ethernet ports

Support SARP/RARP, ICMP, DNS, DHCP, NTP, TFTP protocols

Support NAT traversal via STUN & symmetric RTP

Interoperable with various 3rd party SIP end user device, Proxy/Registrar/Server, and gateway products

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