Cisco 1700 Series Specifications Page 219

  • Download
  • Add to my manuals
  • Print
  • Page
    / 258
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 218
A-3
Cisco 1700 Series Router Software Configuration Guide
78-5407-03
Chapter A Networking Concepts
WAN Technologies
Services
There are two types of ISDN services:
Basic Rate Interface (BRI)This service provides two B channels and one D
channel. Each B channel operates at 64 kbps and carries user data. The D
channel operates at 16 kbps and carries control and signaling information,
although in certain circumstances it carries user data. BRI supports framing
control and overhead, and the total bit rate is 192 kbps.
Primary Rate Interface (PRI)This service provides 23 B channels (which
operate at 64 kbps) and 1 D channel (which operates at 64 kbps) in
North America and Japan, resulting in a bit rate of 1.544 Mbps. In Europe,
Australia, and other parts of the world, PRI provides 30 B channels, 1 D
channel, and 1 maintenance/error channel. Each channel is 64 Kbps, for a
total bit rate of 2.048 Mbps.
Sample Configuration
Figure 0-1 shows an example of ISDN configuration for various devices used to
connect the user to the ISDN network.
Two of the devices shown, the computer and the ISDN telephone, are compatible
with ISDN. The third device, the standard telephone, requires a TA to connect to
the ISDN network through an NT1 or NT2 device.
Page view 218
1 2 ... 214 215 216 217 218 219 220 221 222 223 224 ... 257 258

Comments to this Manuals

No comments