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.
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IP PBX-D503, Support 600 Users and 150 Concurrent Calls, with 2 Slots for E1/T1,FXS,FXO and Hybrid FXU Cards
IP PBX-D503, Support 600 Users and 150 Concurrent Calls, with 2 Slots for DTU, FXS, FXO and Hybrid FXU Cards
Breaking through traditional phone functions, supporting multiple types of outside line access, providing richer functions and greatly reducing enterprise communication costs.
![](https://resource.fs.com/mall/fs_scene_images/20240131171600vaw08p.jpg)
Supports multiple types of outside lines (analog trunks + VOIP outside lines + digital trunk lines), compatible with traditional analog phones and fax machines.
It has all the functions of traditional PBX and more advanced communication functions. Open API interface can be secondary development docking third-party systems.
When the main server fails, all current calls can be automatically switched to the standby server in a short time to ensure normal business.
Web-based management, friendly and easy-to-operate interface, no need for professional management personnel to efficiently manage IP phones.
SIP Users | 600 | 200 | 100 | 500 | 800 |
Concurrent Calls | 150 | 80 | 50 | 60 | 100 |
VOIP Outside Line | 600 | 200 | 100 | 60 | 100 |
Number of Card Slots Available | 2 | 2 | not support | 4 | 4 |
Optional Board Type | D-4FXS D-4FXO D-2FXU D-DTU | D-4FXS D-4FXO D-2FXU | By default, four FXO interfaces are provided. 4FXS or 2FXO+2FXS can also be customized | U-4DTU(E1) U-4DTU(T1) U-8FXS U-8FXO U-4FXU | U-4DTU(E1) U-4DTU(T1) U-8FXS U-8FXO U-4FXU |
Max no.of Analog Trunks | 8(2*D-4FXO) | 8(2*D-4FXO) | 4 | 32(4*U-8FXO) | 32(4*U-8FXO) |
Max no.of Analoge Extension | 8(2*D-4FXS) | 8(2*D-4FXS) | 4 | 32(4*U-8FXS) | 32(4*U-8FXS) |
Max no.of Digital Relay Lines(E1/T1) | 2(2*D-DTU) | not support | not support | 16(4*U-4DTU) | 16(4*U-4DTU) |
CPU | 2.41GHz Dual-core Intel Processor | ARM 4 Core | ARM 4 Core | Distributed multicore cpus | Distributed multicore cpus |
System Memory | 16GB EMMC + 1TB Suveillance HDD | 8G SD Card+ 1TB Suveillance HDD | 8GB SD Card | 32G EMMC | 32G EMMC |
Recording/Voicemail Duration | 15000hrs | 15000hrs | 400hrs | 400hrs | 400hrs |
Power Supplies | AC 100~240V, 50/60Hz, MAX1.5A | AC 100~240V, 50/60Hz, MAX1.5A | DC 12V,1A | Dual power supply redundancy | Dual power supply redundancy |
Way to Install | rack-mount design | rack-mount design | desktop mounting | rack-mount design | rack-mount design |