One embodiment of the present invention provides a switch. The first saw lines run parallel and equidistant with respect to each other in a first direction defined by the rows and the second saw lines run parallel and equidistant with respect to each other in a second direction defined by the columns. The outer shell is formed of a robust fabric which is coated or laminated with plastic. Gas is allowed up past the cable assembly and out the wellhead. In this case, a pressure regulating valve is disposed in the communication passage. The fuse ID of each of the devices is then automatically read before, during, or after standard testing of the devices.