In North America, the ISDN enhancement of Switched 56 is achieved through
two sets of protocols:
These protocols are defined in CCITT standards and are based around the
OSI model for layers 1 to 3. Error recovery and other procedures are handled
by customer equipment. ISDN protocols allow users to utilize the same digital
Signaling System 7 (SS7). Unlike protocols used by Switched 56, SS7 is
an out-of-band protocol, which means that signaling information travels
on a separate network parallel to the data.
Basic Rate Interface and Primary Rate Interface Protocols. These define
the connections between the user and the network.
In addition, ISDN standards define such things as:
Dial-up voice calls
Dial-up 64Kbps digital connections
Physical connector used to connect Terminals to the ISDN network
Caller Identification (Caller ID)
Direct Inward Dialing (DID)
Last modified on May 12, 1996
Your Web Page Creator for this page is P. Allen Jensen.