Extension Module MITEL 470 — 8-port expansion module for Mitel systems (MPN 20350855)

The MITEL 470 Extension Module is an 8-port hardware expansion designed to increase the number of telephone extensions on compatible Mitel communication systems. It connects to an existing Mitel main unit to provide eight additional ports for handsets or extensions without requiring replacement of the central system. The module is intended for environments where modest growth of telephone endpoints is needed and supports quick installation into existing infrastructure.

Advantages

The extension module offers a compact way to expand a Mitel system with eight additional ports while preserving the installed base and configuration. Installation is intended to be straightforward, minimising downtime during expansion. The unit maintains compatibility with Mitel system signalling and power requirements, allowing new handsets to integrate with existing features and call routing. Its small footprint makes it suitable for limited-space installations.

Suitable for

• Small and medium offices expanding handset capacity
• Branch offices adding local extensions without replacing the PBX
• Temporary extension of phone capacity for project teams or short-term sites
• Administrative areas, reception desks and meeting rooms requiring additional handsets

Key specifications

• Port count: 8 extension ports for handsets or endpoints
• Compatibility: designed for use with compatible Mitel communication systems
• Form factor: compact hardware module for rack or shelf placement depending on site configuration
• Installation: connects to the main Mitel unit to extend available ports without central system replacement
• Integration: supports standard signalling and power behaviour expected by Mitel endpoints

How to use

Mount the extension module in an appropriate location near the main Mitel unit or as specified in the system installation guide. Connect the module to the main unit using the manufacturer-recommended interface cable and ensure both devices are powered according to system instructions. After physical connection, configure the main system to recognise and allocate the new ports to extensions or handsets as required. Test each added port by registering compatible handsets and verifying call setup, audio quality and feature availability.

Usage recommendations

The module should be installed by a technician familiar with Mitel systems or following the official installation documentation. Verify compatibility with the specific Mitel main unit model before purchase and ensure firmware and system settings are up to date to enable seamless integration of the additional ports.