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Integrated Services Digital Network (ISDN) is
A basic ISDN line provides a 16 kbps signaling channel and two 64 kbps digital transmission channels used to provide switched circuit connections. It allows digitized voice and data to be sent over existing telephone lines at high speed. ISDN is considered to be the basis for a "universal network" that can support almost any type of communications device or service.
- ↑ NIST Special Publication 800-47, at D-1.
- ↑ U.S. Export Administration Regulations, Part 772 (15 C.F.R. §772.1).
- ↑ FFIEC IT Examination Handbook, Operations, Appendix B: Glossary (full-text).
- ↑ The Evolution of Untethered Communications, at 186.