HT610 uses TI chipset, 2 RJ45 ports, 1 FXS, 1Life line,

Supports SIP 2.0(RFC 3261), H.323, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP,DNS, DHCP (both client and server), NTP, PPPoE, STUN, TFTP, etc. (HT-610 doesn't support H.323)

Built-in router(HT610), NAT, HTway and DMZ port forwarding

Supports call origination and termination from/to the PSTN network

Powerful digital signal processing (DSP) to ensure superb audio quality; advanced adaptive jitter control and packet loss concealment technology

Support various vocoders including G.711 (a-law and u-law), G.723.1 (5.3K/6.3K),G.726 (40K/32K/24K/16K), as well as G.728, G.729A/B, and iLBC.

Support Caller ID/Name display or block, Hold, Call Waiting/Flash, Call Transfer, Call

Forward, in-band and out-of-band DTMF, Dial Plans, etc.

Support fax pass through and T.38 (pending)

Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise

Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control)

Support standard encryption and authentication (DIGEST using MD5 and MD5-sess)

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

Support automated NAT traversal without manual manipulation of firewall/NAT

Support device configuration via built-in IVR, Web browser or central configuration file through TFTP or HTTP

Support firmware upgrade via TFTP or HTTP with encrypted configuration files.