HandyTone series ATA offers VOIP phone users a rich set of functionality and superb sound quality at ultra-affordable price. The Handytone products is ultra-compact, work with any PSTN or cordless phone and fax machines and offers the simplicity of plug-and-dial, making it ideal for residential and SOHO users. The Handytone products have received the prestigious " Best of Show". "product of The Year" and "TMC labs Innovation" awards at inernet Telephony Conference & Expo and from Internet Telephoney Magazine. 
Features of Handytone series: 
1. 1 FXS + 1 LAN for HT286; 
2. 2 FXS + 1 LAN + PSTN for HT386; 
3. 1fxs + 2 WAN / LAN + Router + PSTN for HT486; 
4. 1 FXS + 2 WAN / LAN + Router + 1 FXO for HT-488
5. 2 FXS + 2 WAN / LAN + Router for HT-502
Specifications of Handytone series: 
1. 1 SIP account (HT-286, HT-486) , 2 SIP accounts (HT-386, HT-488, HT-502) , 
2. Support SIP 2. 0 (RFC 3261) , TCP / UDP / IP, RTP / RTCP, HTTP, ARP / RARP, ICMP, DNS, DHCP, NTP, TFTP, PPPoE protocols. 
3. 1 dual color LED button (for event status, message indication, and configuration) . 
4. Web interface or via secure (AES encrypted) central configuration file for mass deployment. 
5. Support Layer 2 (802. 1q VLAN, 802. 1p) and layer 3 QoS (ToS, DiffServ, MPLS) 
6. Fixed IP or DHCP; automated NAT traversal vial STUN. 
7. Nat-friendly remote software upgrade (via TFTP / HTTP) . 
8. Powerful digital signal processing (DSP) to ensure superb audio quality; 
9. Dynamic negotiation of codec and voice payload length. 
10. Support for G. 711 (a-law and u-law) , G. 729 A / B, G. 723. 1 (5. 3k / 6. 3k) , G. 726 and iLBC codecs; 
11. In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO) 
12. Silence suppression and VAD, AGC and AGC. 
13. Advanced adaptive jitter buffer control with packet delay and loss concealment. 
14. Caller ID / Name display or block, call waiting caller ID, flash, call transfer, hold, forward, mute, 3-way conferencing. 
15. Digest authetication using MD5 and MD5-sess, secure configuration file via AES encrytion. 
16. Stylish and compact design, small universal power supply, ideal for travel.