High-Quality, Cost-Effective VoIP Gateway for Legacy Analog Devices

The PLANET VGW-420FS is a versatile 4-port FXS SIP VoIP Gateway tailored for businesses seeking to migrate from analog telephony to IP-based unified communication. Supporting legacy analog devices such as phones, fax machines, and intercoms, it delivers reliable SIP-based voice connectivity with up to 4 concurrent calls and advanced features like SIP trunk, TLS/SRTP encryption, and auto provisioning.

Fully compliant with IETF SIP RFC3261, the VGW-420FS is ideal for SOHOs and branch offices, offering excellent interoperability, cost savings on long-distance calls, and secure, clear VoIP communication with minimal setup and maintenance effort.

Technical Details:

Interfaces:

• 4 × FXS RJ11 ports (analog phone lines)
• 1 × WAN 10/100BASE-TX RJ45 port
• 1 × LAN 10/100BASE-TX RJ45 port

VoIP Capabilities:

• SIP v2.0 over UDP/TCP, SIP Trunk support
• Voice Codecs: G.711 A/u, G.723.1, G.729A/B, G.726, iLBC
• Fax over T.38 and Pass-through
• TLS and SRTP encryption
• Echo cancellation per ITU-T G.168 (up to 128 ms)
• Modem and POS terminal compatibility

Telephony Features:

• Call waiting, blind and attended transfer
• Call hold, call forwarding (all/no answer/busy)
• Hotline, speed dial, direct IP call
• Three-way conferencing, Do Not Disturb (DND)
• Caller ID: DTMF/FSK CLI presentation
• Digitmap and prefix-based call routing

Networking:

• Supports VLAN tagging (802.1Q) and priority (802.1P)
• Layer 3 QoS, DiffServ support
• PPPoE, IPv4
• NAT traversal via STUN
• TR069, SNMP v1/v2/v3, syslog, remote diagnostics

Management:

• Web interface, Telnet access
• Configuration backup/restore, firmware upgrade
• CDR logging, network capture
• Built-in IVR for local maintenance
• NTP and daylight saving time support

Power & Dimensions:

• DC 12V, 1A (5W max.)
• Size: 140 × 86 × 25 mm
• Weight: 200g

Environmental:

• Operating temperature: 0–40°C
• Humidity: 10–90% (non-condensing)
• Certifications: CE, FCC