Referring to FIG. 4, with continuing reference to FIGS. 1-2, the SIP trunk administrator and/or another user may interact with the user interface 44 to conduct a diagnostics test. In implementations, the user may select a button B to initiate the diagnostics test. Initiating the diagnostics test may cause the diagnostics environment 40 to enter into a diagnostics mode. The diagnostics environment 40 may be operable to store data associated with the SIP trunk 29 in the buffer(s) 56 and/or another memory location during the diagnostics mode. The comparison module 48 may be operable to determine the set of configuration settings 43 based on the data in the buffer 56.

Referring to FIG. 5, with continuing reference to FIGS. 1-2, the user interface 44 may include diagnostics screen(s) 58. The diagnostics screen 58 may be operable to display information associated with a configuration and/or status of the SIP trunk 29. The diagnostics screen 58 may be operable to display various information to the user, including the IP address of an incoming (or outgoing) call and information associated with the trunk configuration 42.

The display screen 58 may be established utilizing various techniques. The diagnostics screen 58 may include a list. The list may be associated with the layers and/or sublayers of the network connectivity model.