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48 Chapter 2 WAN Adapter Modules
205677-F Rev 00
For additional information, see the following:
•
•
”
•
Appendix B, “Regulatory Compliance and Telephone Company
Requirements
After the modules are in place and the system is operating, refer to the software
documentation for configuration information (see
).
ISDN BRI Adapter Modules (S/T and U Interface)
The ISDN (Integrated Services Digital Network) BRI (Basic Rate Interface) WAN
modules are used as primary network link connections to the WAN, or for backup
in case of a line failure. Both Port 2 and Port 3 can support the ISDN BRI WAN
modules.
There are two ISDN BRI WAN adapter modules:
•
ISDN BRI (S/T Interface) Adapter Module
•
ISDN BRI (U Interface) Adapter Module
The ISDN BRI provides B-channels and D-channels:
•
The D-channel carries control and signaling information between the user
and the network at 16 kb/s.
•
The two B-Channels carry data, voice, and other services at 64 kb/s.
Содержание Passport 4460
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Страница 16: ...16 Contents 205677 F Rev 00...
Страница 40: ...40 Chapter 1 The Passport 4460 Unit 205677 F Rev 00...
Страница 80: ...80 Chapter 3 Expansion Modules 205677 F Rev 00...
Страница 94: ...94 Chapter 6 Cables 205677 F Rev 00...
Страница 128: ...128 Appendix A Indicators 205677 F Rev 00...
Страница 148: ...148 Appendix C Voice Module Specifications 205677 F Rev 00...
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