Yeastar EX08 Expansion Card
The Yeastar EX08 Expansion Card is an internal telephony expansion board for compatible P-Series PBX appliances. It provides four onboard module slots and eight physical interfaces on its front panel. Therefore, organisations can add analogue extensions, outside telephone lines, or Basic Rate Interface connections according to their requirements. The board supports modular growth within the existing PBX appliance.
Product Overview
The Yeastar EX08 Expansion Card works with the P560 and P570 phone systems. These appliances require a suitable expansion board before administrators can install supported telephony modules. Consequently, the EX08 creates the internal slots and external panel connections needed for additional physical telephone interfaces.
Each of its four slots accepts a compatible telephony module. Available module types include options for Foreign Exchange Station, Foreign Exchange Office, and Integrated Services Digital Network Basic Rate Interface connections. Administrators can select a suitable combination based on the PBX configuration and available interface capacity.
Key Features
- Provides four onboard module slots for installing compatible telephony interface modules.
- Offers eight physical interfaces on the panel for connecting supported telephone lines or devices.
- Supports compatible FXS modules for adding analogue telephones and similar endpoints.
- Accepts suitable FXO modules for connecting analogue PSTN or POTS lines.
- Supports BRI modules for compatible NT or TE digital telephone connections.
- Allows different supported module types to be combined within one expansion board.
- Installs internally, keeping telephony connections integrated with the main PBX appliance.
- Supports the P560 and P570 models listed by the manufacturer.
- Enables organisations to add physical interfaces without installing a separate external gateway.
Technical Specifications
- Brand: Yeastar
- Model: EX08
- Product type: Internal telephony expansion board
- Onboard module slots: 4
- Panel interfaces: 8
- Supported current PBX models: P560 and P570
- Supported interface categories: FXS, FXO, and ISDN BRI
- Compatible modules: S2, O2, SO, and B2
- Installation type: Internal PBX expansion board
- Primary function: Adds module slots and physical telephony interfaces
- P560 expansion-board capacity: 1 board
- P570 expansion-board capacity: Up to 2 boards
Common Applications
The Yeastar EX08 Expansion Card suits offices, hotels, schools, healthcare facilities, retail groups, and customer service environments. It is useful when a P560 or P570 needs more analogue or BRI connections. Moreover, its modular structure allows organisations to select interface types that match existing telephone devices and carrier services.
Why Choose This Product?
The Yeastar EX08 Expansion Card provides a structured method for adding physical telephony connections to a supported PBX. Four module slots allow flexible interface planning, while eight panel connections keep cabling organised. In addition, the internal design centralises telephone hardware within the main appliance. It offers practical expansion for businesses using mixed analogue and digital telephone infrastructure.
Frequently Asked Questions
Why does the EX08 have four slots but eight panel interfaces?
Compatible dual-port telephony modules can provide two interfaces from one module slot. Therefore, four populated slots can serve up to eight panel connections.
Can different telephony interface types share one EX08?
The modular design allows compatible FXS, FXO, and BRI modules to be selected according to the required PBX configuration.
What determines the function of each panel connection?
The module installed behind a connection determines whether it serves an analogue extension, analogue outside line, or BRI service.
Does the EX08 add more PBX users or concurrent calls?
The EX08 adds physical telephony interfaces. User and concurrent-call capacity expansion requires the appropriate D30 capacity module.

















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