A method of analyzing the quality of a communication network for facsimile devices, wherein the communication network comprises at least a first facsimile device communicating through a digital network and a second facsimile device communicating through an analog network. The method comprises establishing a connection between the facsimile devices using the communication network, assessing a configuration of the connection between the facsimile devices, identifying at least one problem in the connection between the facsimile devices, and generating a network diagnostic report of the at least one identified problem. A network diagnostic report may be delivered to a user interface. Bits of the facsimile information fields (FIF) of the digital identification signal (DIS) and non-standard facilities (NSF) signal of the second facsimile device are compared to analyze problems with the communication network.