The Differences Between the Comdial DX-80 and DX-120 Phone System

Posted by Jeff Csisar on


The Comdial DX-80 and DX-120 are popular digital phone systems released by Comdial Vertical. The Comdial DX-80 is the older phone system designed to be a small business phone system that provided key features at a reasonable price. The Comdial DX-120 (Edge 120) is the newer digital phone system designed around the Comdial Edge 120 (7261-00) phone.

Comdial phone system size and user support...

The Comdial Edge 120 (DX-120) phone system is the larger of the two systems. While both systems ship as relatively small systems suitable for office user, the DX-120 can support more users. The DX-120 can support up to 40 CO lines, 80 digital stations, and 8 analog stations.  The DX-80 can only support up to 16 lines, 48 digital stations, and 8 analog ports or 16 lines, 32 digital stations, and 16 analog ports.

DX-80 DX-120
CO Lines 16  40
Digital Stations 48 (or 32*) 80
Analog Stations 8 (or 16*) 8


So what's the differences?

The Comdial DX-80 phone system is set up to use the DX-80 digital phone (7260-00). This phone is a highly programmable phone with thirty buttons. The Comdial 7260-00 can also be supported on the Comdial Edge 120 phone systems.

The Comdial Edge supports a range of digital phones, including the 7260-00 as mentioned earlier. The DX-120 phone (7261-00) is also supported by the system, offering an upgraded more modern appearance. The 7261-00 is not backwards compatible with the older phone system. A cordless Edge 120 phone is also supported by the newer phone system.

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