hi! I have 3070 sopho system,DLX-L board, PNT-L network terminator and some ISDN modems (USB and PCI modems,ETSI-ISDN),RVS software (ISDN applications, telephony/ fax/ videotelephony/ file transfers etc).I try to follow step by step data facilities but desn't work,the ISDN loop test failed.I...