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This picture is about D503+4FXO+4FXS.
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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.
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This picture is about D503+4FXO+4FXS.
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This picture is about 503.

IP PBX-D503, Support 600 Users and 150 Concurrent Calls, with 2 Slots for E1/T1,FXS,FXO and Hybrid FXU Cards

P/N:PBX-D503
US$1,999.00
Pre-order, Ship by 4 Jul, 2025
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Deliver to New York, 10010
Free Shipping via UPS Ground®
Products and Project Inquiry
1-Year Warranty
30-Day Returns
30-Day Exchange

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