Description
The Dinstar DAG1000-4O FXO is an 4-port FXS analog VoIP gateway designed to connect legacy analog phones, fax machines, and PBX extensions to modern IP-based telephony (VoIP/SIP) networks. It bridges traditional telephony devices with IP telephony systems like IP PBXs, softswitches, and SIP servers — making it ideal for businesses, SOHO, call centers, and multi-site deployments.
Core Design & Ports
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4 FXS ports with RJ11 connectors — supports analog telephones and fax machines.
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Ethernet: 1 × WAN + 2 × LAN (10/100 Mbps RJ-45).
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Compact, rack-or desk-friendly design with industry-standard dimensions and ~1 kg weight.
Network & Protocol Support
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SIP v2.0 compatible with UDP/TCP/TLS for secure VoIP signaling.
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IPv4 & IPv6 Dual Stack support for modern networks.
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Works with IMS/NGN platforms, IP PBXs, softswitches, and SIP servers.
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QoS support with 802.1P/Q VLAN tagging & L3 DiffServ for voice traffic prioritization.
Voice & Fax Capabilities
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T.38 Fax over IP and fax pass-through for reliable faxing over SIP networks.
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Multiple voice codecs: G.711 A/U, G.723.1, G.729A/B, AMR, G.726, optional Opus, iLBC.
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Echo cancellation (G.168) up to 128 ms, jitter buffer, VAD, CNG, gain control.
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Supports DTMF (RFC2833, SIP INFO, in-band) and both DTMF/Pulse dialing.
Telephony Features
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Speed dial, call hold, call waiting, call forward (busy/no reply/unconditional).
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3-way conference, blind/attended transfer, do-not-disturb (DND), voicemail/document (MWI).
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Flexible dial plans and routing rules.
Management & Security
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Web, Telnet, TR-069 & SNMP remote management.
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Auto provisioning, firmware upgrade via HTTP/HTTPS, config backup/restore.
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TLS/SRTP encryption for secure SIP signaling and media.
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System logs, CDR export, and cloud-based support options possible.
Practical Use Cases
Business Telephony Integration
Great for small and medium offices that need to connect legacy analog phones to an IP PBX or hosted VoIP service without replacing old hardware.
Call Centers
Supports multiple analog extensions while centralizing call control on SIP trunks or softswitch platforms.
Fax & POS Connectivity
Reliable fax services over IP using T.38, plus support for POS terminals or modem-based equipment.
Multi-Branch Setup
Deploy analog lines across remote offices with unified SIP management and provisioning.
Frequently Asked Questions
Q: What is the Dinstar DAG1000‑4O FXO used for?
A: It’s used to connect up to 4 PSTN/analog lines to a VoIP/IP PBX system.
Q: Does the DAG1000‑4O support SIP protocol?
A: Yes, it supports standard SIP for integration with IP PBX systems.
Q: Does the FXO gateway handle inbound and outbound calls?
A: Yes, it routes both inbound and outbound calls between PSTN lines and VoIP.
Q: Is the DAG1000‑4O suitable for small offices?
A: Yes, its 4 FXO ports make it ideal for small business PSTN to VoIP integration.
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