The VGW-420FS provides the essential features you need for business-class voice communications in an easy-to-manage solution. Designed for businesses with branch offices, it helps the enterprises to save money on long-distance calls.

SIP Applications

• IETF SIP RFC3261 based on UDP/TCP/TLS
• 4-line FXS connects to analog phone set or PABX
• Fax over T.38 and Pass-through
• ITU-T G.711 A-law, G.711 μ-law, G.723.1 and G.729 voice coding
• In-band / out of band DTMF (RFC4733, RFC2833 / SIP INFO)
• Echo cancellation exceeding ITU-T G.168, up to 128ms tail length
• Supports SIP Trunk and Caller ID: DTMF/FSK CLI Presentation

Internet Features

• Supports SNMP v1/v2/v3 
• Supports VLAN 802.1P and 802.1Q
• Supports Layer3 QoS and DiffServ
• Supports STUN (RFC 3489) and Outbound Proxy
• Supports TR069 and Auto Provisioning 
• Supports TLS/SRTP Security 

Call Features

• Call waiting /  transfer (Blind transfer, Attend transfer)
• Call hold / Quick pick
• Call Forwarding Unconditional
• Call Forwarding on No Reply
• Hotline / Speed Dial / Direct IP Call
• Do Not Disturb (DND) / Three-way conference