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This picture is about parts.
This picture is about D503+4FXO+4FXS.
This picture is about D503+D-4FXO+D-DTU.
This picture is about 503.
This picture is about 503.
This picture is about Socket Schematic.
This picture is about 503.
This picture is about 503.
This picture is about parts.
This picture is about D503+4FXO+4FXS.
This picture is about D503+D-4FXO+D-DTU.
This picture is about 503.

Product Highlights

Supports up to 600 Users and 150 Concurrent Calls
Supports Secondary Developed System Based on Asterisk Open Source
Intrusion Auto-detection and Security Protection Using SRTP, TLS and HTTPS Encryption
Support VPN, Static Routing, DHCP, DDNS, Virtual IP, VLAN, etc.
Ideal for Contact Centers and Mid-size Enterprises
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Connectivity Solutions
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IP PBX-D503, Support 600 Users and 150 Concurrent Calls, with 2 Slots for DTU, FXS, FXO and Hybrid FXU Cards

IP PBX-D503 provides a centralized solution for enterprise communications needs. Supports 600 users and 150 concurrent calls, and provides two hot-swappable FXO, FXS, Hybrid FXU, and DTU installation slots. Supports a maximum of eight analog phones or eight analog external lines, and two E1/T1 digital trunks. It can be flexibly configured and combined based on actual scenarios. Truly set voice, video, paging, fax, meeting, recording and other practical functions in one. Achieve enterprise-level unified VoIP communication with innovative software features.

Certifications
To get the detailed certification, please go to the Compliance Center.

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