Dinstar DAG2000-16S 16-Port FXS VoIP Gateway SIP IPv4/IPv6

The Dinstar DAG2000-16S is a multi-functional analog VoIP gateway designed to bridge IP-based telephony networks with legacy POTS telephones, fax machines, and PBX systems. Equipped with 16 FXS ports and three 10/100 Mbps Ethernet interfaces, it delivers a cost-effective path to VoIP adoption for small and medium businesses, call centers, and multi-location enterprises. The gateway supports SIP v2.0 over UDP and TCP, dual-stack IPv4/IPv6 operation, and a broad codec suite including G.711, G.723.1, G.729A/B, AMR, and G.726. Fax continuity is maintained through T.38 and pass-through modes at speeds up to 14.4 kbps. Remote provisioning and fleet management are simplified via TR-069, SNMP v1/v2/v3, auto-provisioning, web/Telnet interfaces, and cloud-based management. The unit is CE and FCC certified and operates across a 100–240 VAC input range, making it suitable for global deployments.

Key features & benefits

• 16 FXS Ports via RJ11 — Sixteen analog FXS ports with RJ11 connectors allow simultaneous connection of POTS phones, fax machines, or legacy PBX extensions, supporting both DTMF and pulse dial modes at 10 and 20 PPS.
• Dual-Stack IPv4 and IPv6 — Native support for both IPv4 and IPv6 networking ensures the gateway integrates cleanly into modern and transitional network infrastructures without requiring additional translation hardware.
• SIP v2.0 Protocol Compatibility — Full SIP v2.0 (RFC 3261) implementation over UDP and TCP, including SIP over TLS, makes the DAG2000-16S broadly compatible with leading IMS/NGN platforms and SIP-based IP telephony systems.
• Fax over IP with T.38 and Pass-Through — T.38 real-time fax relay and pass-through support preserve fax reliability across IP networks, with high-speed fax capability up to 14.4 kbps and additional support for modem and POS signaling.
• Comprehensive Codec Support — Multiple voice codecs including G.711A/U, G.723.1, G.729A/B, AMR, and G.726 provide flexibility in balancing voice quality against available bandwidth across diverse network conditions.
• Advanced Voice Quality Processing — Echo cancellation per G.168 with up to 128 ms tail length, adaptive jitter buffer, silence suppression, comfort noise generation, voice activity detection, and programmable gain control work together to maintain intelligible, consistent call quality.
• Rich Supplementary Services — Built-in telephony features including call waiting, blind and attended transfer, three-way conferencing, call forward variants, do-not-disturb, message waiting indicator, and warm/immediately hotline reduce dependence on upstream PBX feature licensing.
• Enterprise-Grade Management — SNMP v1/v2/v3, TR-069, auto-provisioning, CDR logging, syslog with eight severity levels, network capture, GR909 outward testing, and cloud-based management give administrators full visibility and control across distributed deployments.
• VLAN and QoS Support — 802.1P/802.1Q VLAN tagging for voice, data, and management traffic planes combined with Layer 3 QoS and DiffServ marking allow precise traffic prioritization on converged networks.
• Flexible Dial Plan and Routing — Digitmap, prefix-based routing rules, caller and called number manipulation, hunting groups, and bandwidth optimization give administrators fine-grained control over call routing behavior without requiring external dial plan servers.