Basic Rate Interface
190
Interphase Corporation
Basic Rate Interface
The ISDN Basic Rate Interface consists of three digital
channels: one D channel and two B channels. These channels
can be used simultaneously, and are often referred to as
2B+D
.
Each ISDN B channel can be used separately to allow two
different connected users at the same time. The ISDN B
channels can also be combined to provide a total bandwidth of
128 Kbps.
Primary Rate Interface
The ISDN Primary Rate Interface, like BRI, has one D
channel, but it has more than two B channels. The number of
B channels for PRI differs in different locations.
•
In North America and Japan, PRI consists of 24 digital
channels: one D channel and 23 B channels.
•
In Europe and Australia, PRI consists of 31 digital
channels: one D channel and 30 B channels.
These channels can all be used simultaneously, and are often
referred to as
23B+D
(North America and Japan) or
30B+D
(Europe and Australia).
Each ISDN B channel can be used separately to allow multiple
connected users at the same time. The ISDN B channels can
also be combined to provide a total bandwidth of 1472 Kbps
(North America, Japan) or 1920 Kbps (Europe, Australia).
Summary of Contents for ENTIA 5536 DM PRI
Page 34: ...Minimum System Requirements 14 Interphase Corporation...
Page 46: ...Connecting to an MVIP Bus 26 Interphase Corporation...
Page 56: ...Connecting to the Network 36 Interphase Corporation...
Page 90: ...Removing the Drivers 70 Interphase Corporation...
Page 136: ...Verifying COM Ports 116 Interphase Corporation...
Page 172: ...Saving and Editing Frames 152 Interphase Corporation...
Page 182: ...Understanding LoopTest Messages 162 Interphase Corporation...
Page 190: ...Setting Port and Clock Modes 170 Interphase Corporation...
Page 196: ...Interpreting Line Status Indicators 176 Interphase Corporation...
Page 208: ...Procedures 188 Interphase Corporation...
Page 220: ...Europe 200 Interphase Corporation...