Systems (100) and methods (500) for connecting network resources of a first network (116) to network resources of a second network (118). The second network is different from the first network. The methods involve receiving a first message (302, 402) from a first network resource (106) of the first network. The first message has a first protocol format. In response to the first message, a second message (308, 408) having a web service request format is dynamically generated. The second message is communicated to a third network resource (112) of the second network for conversion into a third message (314). The third message has a second protocol format different from the first protocol format. The first network can be an SIP network. The second network can be an SS7 network.