Yeastar TA400 FXS Gateway with 4 Ports for Analog Phone and VoIP Integration

The Yeastar TA400 is a VoIP FXS gateway connecting analog telephones and fax machines to VoIP infrastructure and IP-PBX systems through 4 RJ11 FXS ports, designed for SMB organizations seeking to integrate existing analog terminals into IP telephony without replacing them. The device supports SIP (RFC3261) and IAX2 and provides bidirectional conversion between analog terminals and VoIP networks, reducing communication costs through SIP routing while preserving investment in existing telephony infrastructure. It is commonly deployed as an entry-level analog gateway in businesses with a small number of active analog endpoints.

The TA400 supports TLS and SRTP, voice codecs G.711 (alaw/ulaw), G.722, G.726, G.729A/B, GSM, and ADPCM, ITU-T G.168 LEC echo cancellation with Dynamic Jitter Buffer, VAD, CNG, and PLC. Fax is supported via T.38 and Pass-through. FXS signalling covers Loop Start and Kewl Start, Caller ID in BELL202, ETSI (V23), and NTT (V23-Japan) formats, and disconnect methods Busy Tone and Polarity Reversal. Short and Long Haul support enables terminal connections up to 1.5 km on 24 AWG wire.

Telephony features include 3-way conference, attended and blind transfer, call forward, call waiting, do not disturb, Caller ID display, distinctive ringtone, flexible dialing plan, hunting groups, hotline, MWI, speed dial, and CDR. Management covers Web GUI, auto provisioning, RADIUS, TR-069, backup and restore, firmware upgrades via HTTP/TFTP, packet capture, and system logs. Network features include DHCP, DDNS, OpenVPN, PPPoE, Static Route, and VLAN, with security through built-in Firewall, IP Blacklist, and Attack Alert.

The TA400 is suited for SMB organizations with up to 4 active analog terminals integrating analog telephony into IP-PBX systems, businesses retaining existing fax machines within VoIP infrastructure, offices requiring FXS port connectivity to a softswitch or IP-PBX via SIP, and desktop or wall-mount deployments in space-constrained environments.