Networking Articles and Tips |
| Posted: 25 Jan 2012 09:30 PM PST ISDN utilizes circuit-switching to establish a physical permanent point-to-point connection from the source for the destination. ISDN has standards defined by the ITU that encompass the OSI bottom three layers of that are Physical, Data Link and Network. At the physical layer the ITU has defined the user network interface common as I.430 for Simple [...]
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