Product description:

GNEX-188 is a kind of voice communication terminal which is based on wide band and independent of PC (personal computer) .

Voice Features
* Support SIP RFC3261
* Codec: G. 711A/ u, G. 7231 high/ low, G. 729
* Echo cancellation: Support G. 168, and Hands-free can support 96ms
* Support Voice Gain Setting, Jitter Buffer, VAD, CNG, dual GK, call forward, and Peer to Peer
* NAT transverse: support STUN client, Citron, AVS
* SIP support SIP domain, SIP authentication (none, basic, MD5) , DNS name of server, Peer to Peer
* SIP support Pubic & Private server. Can connect to public SIP and Private SIP server at the same time
* SIP support dual public server
* DTMF: Support SIP info, DTMF Relay, RFC2833
* SIP application: support Call forward/ transfer/ holding/ waiting
* Call control features: Flexible dial map, support Hotline, Empty calling No. Reject service, Black list for reject authenticated call, No disturb, Caller ID.
* Support conference call and voice record
* English, Spanish, Czechoslovak alternative

Network Features
* WAN/ LAN: Support Bridge and Router model
* Support basic NAT and NAPT
* Support PPPoE for xDSL
* Support DHCP Client on WAN
* Support DHCP Server on LAN
* Support DNS Relay, SNTP Client, Firewall
* Network tools in telnet server: Including ping, trace route, telnet client

Maintenance and Management
* Support Boot Monitor
* Can upgrade firmware through boot monitor
* Can config through Web, keypad, Telnet
* Can upgrade firmware and configuration file through HTTP, FTP, TFTP
* Support Syslog