S300

Manufacturer reference

Manufacturer details describe the cited version. Confirm the exact unit and intended system.

Capacity and selection

Module-based PBX reference

S300 is included in the Yeastar S-Series VoIP PBX installation guide; use its exact model section, not S100 or P-Series limits.

Manufacturer lifecycle

Manufacturer end-of-sale effective 1 July 2022; no local availability promise.

Expansion-board limit

Legacy S300 reference: up to 3 EX08/EX30 boards; S300 V4.0 is limited to 2 expansion boards.

D30 module limit

Up to 2 D30 modules, including the S300 V4.0 reference; they are optional capacity modules.

Ethernet interfaces

2 RJ45 10/100/1000 Mbps adaptive Ethernet interfaces.

Ethernet modes

Single (LAN uplink, WAN disabled), Bridge (WAN bridges a PC), or Dual (both ports for uplink).

Recording storage interfaces

SD card and USB device connections are listed for automatic recording; media, capacity and recording availability need separate confirmation.

Console interface

RS-232 console reference for system diagnostics.

Interfaces and operating requirements

EX08 interface selection

The shown EX08 configuration supports modular FXS, FXO or BRI line roles; no complete fitted port set is assumed.

EX30 interface reference

EX30 is listed with one E1/T1 port; board choice shares the expansion-board limit.

D30 capacity reference

Each appropriate D30 adds 100 extensions and 30 concurrent calls; this does not establish S300 base capacity or line-port totals.

Hardware-version use limitation

The guide restricts S-Series V4.0 hardware to commercial or industrial use, not domestic use.

Power-selection guidance

Use the specified manufacturer power supply and actual unit rating; keep power off during installation.

Selection notes

• Confirm the complete supplied model, hardware version and firmware; optional boards, modules, licences, carrier service and local stock are not included or confirmed.
• Manufacturer references do not confirm ISD stock, price, delivery, package contents, local warranty or publication approval.
• Manufacturer lifecycle notice covers S100 and S300 together; end-of-sale is not proof of current stock, firmware suitability or local support.
• Expansion figures require the correct optional board/module and exact hardware/firmware; maximum port counts are alternatives, not all interfaces fitted at once.
• This use limitation applies to V4.0 hardware; do not infer that every S300 is V4.0.

Official documents

• Yeastar S-Series installation guide / exact S100,S300,S412,D30 sections
• Yeastar current S-Series lifecycle and hardware-version firmware notice

Manufacturer source checked 2026-10-20. The supplied unit and local terms require confirmation.