The TSS500M/6B meets the requirements of Bellcore GR109 for first and second-level lightning surge on two or four telecom ports. It simulates the 2/10, 10/360 and 10/100 surge waveforms up to 5 kV; all in a single 9 U high package. Pulse repetition rates vary from one every two seconds for the 2/10 pulse up to one per minute for the 10/1000 pulse. Other features include a built-in voltmeter and current meter to measure and record the peak surge voltage and current, standard IEEE 488 and RS232 computer interfaces and a CRO oscilloscope trigger. Optional ISM IEC software for control and complete reporting is available, as is a CNB500 coupling network for surging up to 12 pair of telecom ports with the 10/360 pulse.