A system and method of managing telephone network facilities. The method and system comprise identifying an isolation requirement of the ASIC and determining an optimized pattern for substantially diagonal pairing of signal pins in relation to the isolation requirement. A subsequent inductance L is determined by the impedance measuring circuit. A spacing between the rollers is varied such that a distance between a final contact point and an initial contact point of at least a first pair of rollers along the transport path is different from a distance between a final contact point and an initial contact point of at least a second pair of consecutive rollers along the transport path. The improved methods include one or more of: placing the patient in the Trendelenburg position, applying external compression around the vein, massaging the vein, cooling the vein externally, encouraging spasming of the vein, and removing blood with a suction device. When reproducing the marks, the signal including the recorded mark is read under the condition where the influences of the leakage magnetic fields from the neighboring tracks counterbalance each other.