Snom M400 DECT single-cell base station

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Snom M400 DECT single-cell base station

Common issues and fixes

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Snom M400 DECT single-cell base station

About this product

• The M400 DECT base station offers the full range of telephony business features, managing up to 10 parallel calls with up to 20 SIP accounts.

• Key features include:

• TLS encryption for secure connections
• Up to 20 handsets and 10 parallel calls
• Wall mountable design
• Wideband audio (HD voice) for high-quality voice communication
• Single cell operation with remote maintainability and zero-touch deployment
• Power over Ethernet (PoE) connectivity
• OTA updates for seamless software security patches
• Directory support for efficient phonebook management

• Additional information:

• Weight: 1 lb
• Dimensions: 5.4 × 5.7 × 1.8 in
• Phone Type: DECT

• Technical specifications:

• Model: M400
• APN: 89-S071-00
• General Info:
• Dimensions: 112 x 90 x 36 mm (LxWxD)
• Weight: 170g
• Cell type: Single cell
• Number of connected handsets: Up to 20 handsets
• Number of simultaneous calls: Up to 10 NB calls / 5 WB calls
• Compatible handsets: M25, M30, M65, M70, M80, M85, M90
• Repeater support: YES, up to 6
• Power Connector: PoE
• Power over Ethernet class (PoE): IEEE 802.3af, Class 2
More product details
The Snom M400 is a single-cell DECT base station designed for small to medium-sized office environments where cordless flexibility is essential without sacrificing business-grade telephony features. It is an ideal choice for companies that already use or plan to deploy Snom DECT handsets, as it supports up to 20 handsets and handles up to 10 simultaneous calls (5 in wideband mode). The device is powered entirely via PoE, making it easy to mount on a wall or place on a desk without needing a separate power outlet—a practical advantage for tidy office setups in the GTA or elsewhere.

This base station pairs well with Snom's M-series handsets (models M25 through M90) and can extend coverage with up to six repeaters, suiting open floor plans or multi-room offices. However, because it is a single-cell system, its wireless range is limited to a single DECT coverage area; larger facilities may require multiple M400 units or a multi-cell system. The M400 supports TLS encryption for secure SIP signaling, which is a plus for businesses handling sensitive client data, but note that wideband calls are limited to five simultaneous connections, so call centres with heavy HD audio usage may find the narrower bandwidth restrictive.

For Canadian businesses, the M400 works with any SIP-compatible VoIP provider, including regional carriers like Rogers Business or Telus, as long as the provider supports standard DECT registration. The zero-touch provisioning and remote maintainability features are particularly useful for IT teams managing distributed offices in the Greater Toronto Area, as firmware updates and configuration changes can be pushed over the air. This base station is not intended for home use or for environments requiring dozens of users; it is squarely aimed at professional deployments where a handful of cordless users need reliable, secure voice communications.