Labels:text | screenshot | diagram | rectangle OCR: THE TWO INTERFACES OF ISDN Central Office Wall S/T ISDN adopter NT-1 Wall ISDN adapter NT-1 (Integrated NT-1) Figure 1: ISDN adapters utilize two interfaces: S/T and U. An NT-I sis between the S/T and U interfaces. Multiple S/T devices can connect to most external NT -Is. An NT-I can also be integrated into the ISDN adapter.
