TREGers, I'll give just a few more points concerning the FCC surge testing on an ISDN S/T device. As stated already, IC does require surges on ST devices. However, the FCC also requires surges on S/T equipment to cover its use in a campus invironment (the sharing of one host equipment by several building that communicate via S/T cards.) In this situation the S/T card is not isolated by an U interface therefore the surge tests are applicable. This issue was addressed by TIA TR41.9 members which recommended that surge testing be done to cover this situation.
John Chase CCL
