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Description :
Detailed Description
Support SIP 2.0 (RFC3261) and correlative RFCs
Support IAX2
SIP supports 2 SIP servers, public and private server.
Can connect to public
SIP and private SIP server at the same time
CodecG.711A/u, G.7231 high/low, G.729a/b, G.722
Echo cancellation: G.168 Compliance in LEC, additional
acoustic echo
cancellation(AEC) can reach 96ms max filter length in hands-free
mode
Support Voice Gain Setting, VAD, CNG
Full duplex hands-free speakerphone
NAT transversesupport STUN client
SIP support SIP domain, SIP authentication (none,
basic, MD5), DNS name of
server, Peer to Peer/ IP call
DTMF Relaysupport inband, SIP info, RFC2833
SIP application: support call forward/ transfer/
holding/ waiting/conference/
paging and intercom
Call control features: flexible dial map, hotline,
empty calling no. reject
service, black list for reject authenticated call, limit call, no
disturb,
caller ID
Support phonebook 500 records
Incoming calls /outgoing calls / missing calls. Each
supports 100 records.
Support conference and voice record on SIP server
Support voice record in this phone, 240 seconds max or
3 record max,
user-defined record prompt with 1 minute max
8 kind of ring types
Network Features
WAN/LAN: support bridge and
router model
Support PPPoE for xDSL
Support basic NAT and NAPT
Support DHCP client on WAN
Support DHCP server on LAN
Support main DNS and secondary
DNS server.
Support VLAN (optional: voice
vlan/data vlan)
Support DMZ
Support DNS Relay, SNTP
Client, Firewall
Support VPN (L2TP/UDP
TUNNEL)
QoS with DiffServ
Network tools in telnet server: including ping, trace route, telnet
client
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VoIP Products 
