Today, we are going to be taking a look at the Digium D40. The D40 is an Entry-Level Desktop VoIP Phone designed exclusively for use with Asterisk and Switchvox. Featuring HD Voice and plug and play deployment, this offering from Digium is at a price that will fit any budget. 


A positive trend in this industry seems to be manufacturers environmentally packaging their products. The Digium D40 is no different and comes in a cardboard box with minimalistic design work. This also underlines the strength of Digium’s branding, they do not have to rely on attention grabbing boxes as users are fully aware of the quality product inside. 


Key Features

The Digium D40 comes with a number of essential key features. 

  •  3.5 inch, 240x 120 pixel backlit grayscale LCD display
  • 2 line appearance keys 4 feature keys
  • 4 context sensitive soft keys
  • 6-key navigation controller Headset, speaker, and mute keys
  • 2-color LED Message Waiting indicator Volume control
  • RJ-9 headset jack
  • 2 switched 10/100 Mbps Ethernet ports 5 volt DC power port

What’s in the Box


In the box there is:

  • 1x Digium D40 Base Unit
  • 1x Desk stand
  • 1x Handset
  • 1x Curly cord
  • 1x PoE cable
  • Product documentation

Look and Feel


The branding is further enhanced with the inclusion of the Asterisk logo on the body of the base unit. It is subtle and looks smart. The D40 feels robust meaning it can stand up to wear and tear in the workplace. The scratch resistant surface will keep the phone looking at its best.  

The buttons on the device are large and well spaced, meaning the usability of the phone should be ideal for everyone. When combined with the black and white LCD display, the D40 offers an excellent user experience to its users.


How does this Compare?

 The Digium D40 sits at the lower end of Digium IP Phones. The D50 and D70 offer more lines keys, larger displays and more feature keys. However, the trade-off here is the lower price point, making this product more suitable for small or home business.

Note: Please refer to the Digium VoIP Phone Range Detailed Comparison Table for more information

Digium IP Phones Comparison Table

Customer Reviews

Julian Beach left a fantastic review of the Digium D40 over on

It is a good, solid phone, with a large display. Configuration is easy using the web interface and changes to the configuration made via the web interface appear quickly without a long reboot. The phone is Power Over Ethernet ready, and does not come with a power supply, although it does have a socket for a 5v power supply.

The full review can be read here: Digum D40 Customer Review

The Bottom Line

This entry-level VoIP solution comes from a manufacturer with  a great reputation and huge community. The fundamental feature set at a cost-effective price makes this product a good choice for small and home business. Should your business need a slightly more comprehensive solution, check out the higher-end D50 and D70.

Digium is also a supported manufacturer through VoIPon Technical Support. More information on VoIPon Support can be found here: VoIPon Support Guide


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