In any implementations, the comparison module may be operable to determine the set of configuration settings based on the data in the buffer.

In any implementations, the one or more processors may be associated with a host computer. The host computer may be remote from the SIP trunk.

In any implementations, the host computer may be operable to interconnect the SIP trunk and a telephone network.

A method of diagnosing a session initiation protocol (SIP) trunk configuration may include accessing data associated with a SIP trunk. The SIP trunk may be defined according to a configuration including a set of configuration settings associated with respective layers and/or sublayers of a network connectivity model. The set of configuration settings may be selectable from respective groups of configuration options. The method may include determining a configuration status of the SIP trunk based on the data, which may include comparing the set of configuration settings to a set of supported configuration options. The set of supported configuration options may be associated with the respective layers and/or sublayers of the network connectivity model. The set of supported configuration options may be associated with fewer than all configuration options of the respective groups of configuration options. The method may include displaying the configuration status of the layers and/or sublayers associated with the SIP trunk in a user interface.

In any implementations, the data may be associated with at least one call between the SIP trunk and a telephone network.