Patent ID: 6898186

Claim:
A network communication system for communicating information between a point of origin and a point of destination using a pass-through mode of tunneling through a packet switching network comprising: a first network access server coupled to the point of destination for communicating therebetween through a public switching telephone network and responsive to information from a second network access server originating at a point of origin through a public switching telephone network, said first network access server and said second network access server communicating therebetween through a packet switching network; and a lab network access server coupled to the first network server through the packet switching network and to the second network access server through the packet switching network, upon the point of origin establishing a call to the point of destination, through the second network access server and upon the second network access server failing to successfully communicate with the first network access server, said lab network access server responsive to a succeeding call from the second network access server using a pass-through mode of tunneling, through the packet switching network and terminating the succeeding call thereby allowing diagnosis and debugging of the failure associated with the second network access server at the location of the lab network access server.