Dinstar DAG2500-72 72 ports FXS High-density Analog VoIP Gateway

The DAG2500 Series FXS analog gateway is a versatile 1U voice gateway that connects analog phones, fax machines, and PBXs to VoIP networks, supporting up to 72 FXS ports with RJ45/RJ21 interfaces. It delivers high-performance voice and fax processing and supports standard SIP and RTP protocols, ensuring compatibility with leading platforms such as BroadSoft, Asterisk, FreeSWITCH, IMS/NGN softswitches, and call center systems. Ideal for enterprises and service providers, the DAG2500 enables seamless branch-to-branch communication, providing a reliable, efficient, and cost-effective solution for high-quality IP telephony.

Key Highlights:

• High-density gateway with 72 FXS ports in a compact 1U size
• Supports IPv4 and IPv6
• Maximum line length up to 5 km
• Supports SNMP and TR-069
• Supports multiple codecs: G.711A/U, G.723.1, G.729A/B, and iLBC
• Compatible with Asterisk and FreeSWITCH platforms, and BroadSoft
• Fully compatible with leading IMS/NGN and SIP-based IP telephony systems

Technical Highlights:

Phone Connector:

• DAG2500-72S: 72 FXS, RJ 45 or RJ21, 50 PIN

Console:

• 1x RS232, 115200bps

Call features:

• Digit map
• IMPU support
• Action URL
• Voicemail
• Custom IVR
• Call waiting
• Call holding
• Do-not-disturb
• Blind transfer
• Attended transfer
• Call forward on busy
• Call forward on no reply
• Ringing group and hotline
• 3-way conference
• Early media / early answer
• Abbreviated dialing
• Access and peer mode
• SIP PnP auto provisioning
• PBX IVR
• Unconditional call forward
• SIP registration to multiple servers
• Flexible call routing policy
• Caller and called number manipulation

FXS:

• Connector: RJ45 or RJ21
• Max Line Length: 5 km
• Reversed Polarity
• Pulse: 10 and 20 PPS
• Dial Mode: DTMF and Pulse
• Programmable Call Progress Tone
• Caller ID: DTMF/FSK CLI Presentation

VoIP Protocol:

• SIP v2.0 (UDP/TCP), compliant with RFC3261
• Supports SDP, RTP (RFC2833), RFC3262, RFC3263, RFC3264, RFC3265, RFC3515, RFC2976, RFC3311
• RTP/RTCP, compliant with RFC2198 and RFC1889
• Supports IPv4 and IPv6
• Outbound proxy support
• Master/slave server configuration
• TEL URI support (RFC2806)
• NAT traversal with RFC3581, rport
• VLAN support 802.1P/802.1Q
• Session timer compliant with RFC4028
• DNS SRV/A query and NATPR query
• NAT support: STUN, static and dynamic NAT