VoIP Phone, Supports Conference and Voice Record on SIP Server

Model Number: QX502 Brand Name: Cosun Key Specifications/Special Features: Phone features Vxworks OS Support SIP2.0 (RFC3261) and correlative RFCs SIP support 2 SIP servers, and backup SIP proxy servers Supports SIP UDP / TCP/ TLS SIP support SIP domain, SIP authentication (none, basic, MD5) , DNS name of server, peer-to-peer/IP callDisplay Display resolution: 128x48Key features Large dot matrix LCD display and soft keys make user easier to use
Soft keys programmable
Supports RJ-9 headset
Multi languages displayed

Audio features
HD voice: HD handset
Codec: G.711A/u, G.7231 high/low, G.729AB, G.722, G.726-32
DTMF: in-band, RFC 2833 and SIP INFO
Full duplex handsfree speaker phone with acoustic echo cancellation
Voice activity detection (VAD)
Comfort noise generation (CNG)
Background noise suppression
Adaptive jitter buffers
Packet loss concealment
SRTP
Mute

Advanced features
Call forwarding (busy/no answer/always)
Call transfer (unattended/attended/semi-attended )
Call holding
Call waiting
3-way call conference
Capable of 10-way conversation
BLF list
Join call
Call pickup
Call park
Redial
Call back
Call completion
Hot desking
Auto redial
Predial
SIP messaging , MWI
Flexible dial plan
Barring function for outgoing calls
Call logs with missed calls/incoming calls/outgoing calls. Each support 300 records
Phonebook 500 records
Speed dial (abbreviated dialing)
Hotline/warm-line
Call rejection
Black list/white list
Intercom/intercom barge
Password dialm DTMF hidden
Action URL/ active URI
Voice codec setting for each SIP line
Multicast
LDAP, XML phonebook
Web dial
Keypad lock, emergency call

Do not disturb
Auto answer
Caller ID display
CLIR(rejects anonymous calls)
CLIP(to make an anonymous call)
Dial without registration

Network/security features
WAN/LAN: 10/100Mbps Ethernet ports
Bridge mode and route
PPPoE for xDSL
802.3af PoE (optional)
VLAN (Voice VLAN/Data VLAN)
802.1X
NAT (NAPT)
NAT transverse: support STUN client
DHCP client on WAN/ DHCP server on LAN
Main DNS and secondary DNS server
DNS relay