🧠 Core Purpose
A PBX (Private Branch Exchange) system:
Connects internal extension phones so staff can call each other using extension numbers.
Shares central office (CO) lines so many users can make and receive calls without each needing a separate external phone line.
Improves call handling and professional communication within the business environment.
CESLLER systems are used in settings like offices, shops, front desks, and call handling environments.
📦 Typical Features (Example: CESLLER WS824 PBX)
Exact features vary by model (e.g., WS824 variants). Below are common capabilities based on typical CESLLER products:
Capacity & Connectivity
Supports multiple external lines (CO Lines) and many internal extensions — e.g., 4 CO lines and up to 16 extensions in some builds.
Allows connection of key phones and standard extension telephones.
Call Management
Internal calls between extensions without using an external line.
Inbound/outbound call routing via shared external lines.
Caller ID support for both incoming and outgoing calls.
Music on Hold and conference calling functions.
Call transfer between extensions.
Extension Management
Flexible extension numbering (e.g., 1–8 or more digits).
Internal call plans and extension dialing rules.
VoIP / SIP Support (in capable models)
⚙️ Technical & Functional Notes
Runs on embedded systems, sometimes Linux + Asterisk platform for call processing.
Uses SIP 2.0 standard for IP telephony in capable models.
Supports basic voice coding standards (e.g., PCMU/PCMA, G.729) for efficient voice data encoding.
🏢 Typical Use Cases
✔ Small to medium business phone systems
✔ Office reception desks with multiple extensions
✔ Call management environments needing internal routing and shared lines
✔ Organizations that want cost-effective internal phone networking and line sharing
📌 Summary
CESLLER PBX Systems are telephony solutions that:
Offer shared call connectivity for multiple users
Provide internal extension dialing
Manage incoming/outgoing calls efficiently
Support additional features like caller ID, call transfer, conference calling, and VoIP integration (on some models)
They help businesses centralize telephony and enhance communication workflows.
