1. Key Industry Standards Support
SIP Proxy/Register/Application Server
RFC3261 (RFC3262, 3263, 3265, 3325, 3515, 3581, 3891, 2976, 3326, 4235, 4240)
SDP (RFC2327,4566,3264,4574,4796)
RTP (RFC1889,3550 3984)
DTMF: In-Band/Out-of-Band (RFC2833)/SIP INFO
HTTP/Digest Authentication (RFC2617)
MWI (Message Waiting Indication) RFC3842
Presence/IM (RFC2778, 3858, 3863, 4480)
Voice Codec: (TransCoding) G.729A,GSM, Speex, G.711U, G.711A; (Pass Through)
iLBC, G.723, Video Codec: H.263, H.264, Mpeg4 [Pass Through]
VPN: PPTP/L2TP Server,Open VPN Client
Enum (RFC2916,3761, 3764)
PPPoE (RFC2516)
Dynamic DNS (RFC2136, 2137), DHCP(RFC2131)
2. Key features support
2.1 Accommodation for Network Conditions of SME
Two Ethernet RJ45 (LAN/WAN) 10M/100M Network Ports, Router functions.
Supports DMZ Deployment
DHCP Client, PPPoE (ADSL), or Static IP
Supports Dynamic DNS (DDNS) Registration
Open VPN Client and PPTP VPN server
Supports SIP NAT
DHCP Server
2.2 QoS Control Functions
Compliant with Tag of VLAN, 802.1P/802.1Q
Supports Type of Service (TOS/DSCP)
Jitter Buffer and CNG for better voice quality
Echo Cancellation
2.3 External Trunk Connections
SIP Trunk, Connection with ITSP(Internet Telephone Service Provider
- Outgoing SIP calls
- Incoming calls with multiple registrations; every extension can have different
DID number from different ITSP.
FXO Trunk
- Incoming or outgoing calls via FXO ports.
Supports ENUM TrunkOptional
2.4 Flexible and Manageable Dial Plans or Calling Route
Use a prefix to select different route (ITSP, FXO, Inter-CNX) to make call.
Least Cost Routing (LCR) for better cost management
Trusted host function for better security and multi-locations interconnection
Supports grouping of extensions
2.5 Typical PBX Features
Basic extension call functions
Create or Remove an Extension 
Call Forward (Always, On Busy, No answer, Offline)
Call Transfer / Call on Hold
Call Park
Follow Me
Call Pick-Up
Extension acts as an operator
Auto Attendant
Do not Disturb (DND)
Call Restricted
Music on Hold or Personalized Greeting
Call Detail Records (CDR), Supports customized calling rate.
T.38 Fax (Pass Through)
Supports Voice Mail with personal greeting (with MWI)
Caller ID (FXO ports support FSK and DTMF Caller ID)
2.6 Advanced IP-PBX Features
Supports Automatic Call Distribution
- Random, Rotation, Longest Idle, Ring All, Least answered
Supports Conference Bridge (supports 6 to 12 participants per conference)
Video Communication (Supports H.264 /Pass Through)
Tight up an extension with mobile phone
Supports Group ringing
Supports Customized IVR Call FlowXML describe IVR
Presence/Instance Messaging
Built-in Push2Talk FunctionMicrosoft IE/Firebox Plug-In,Supports Web800

IP PBX With 1xWAN 1xLAN 4xFXS 4xFXO,SIP PBX