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Remote Annex 6300 Supplement to the Remote Annex Administrator’s Guide for UNIX
Chapter 1 Introduction to the Remote Annex 6300
A-10
Book A
Typical ISDN Network Configurations
The following are examples of the three ISDN connection types supported
by the RA 6300.
Voice (Modem) Calls
The example in
Figure A-1
shows a PC user with a standard modem (e.g.,
a V.34) dialing into the RA 6300.
Other modem call configurations can be established instead of the one
shown in
Figure A-1
.
Figure A-1. Voice Call Over Analog Line
In
Figure A-1
, the CO of the telephone company terminates the analog
line from the modem, converts the voice call into digital data, and
dynamically chooses a PRI B channel to carry the data through the
telephone network to the RA 6300. The CO also converts the signals
describing the characteristics of the call into ISDN out-of-band signaling
messages, as defined by the Q.931 standard. These signaling messages
are carried to the RA 6300 on the D channel (channel 24).
Analog Line
Modem
CO
PRI Line
Remote
Annex 6300
PC
Corporate
LAN
PRI Port
Ethernet
Port
Содержание 6300
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Страница 114: ...Remote Annex 6300 Supplement to the Remote Annex Administrator s Guide for UNIX Chapter 5 Modems A 86 Book A ...
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Страница 484: ...Remote Annex 6300 Supplement to the Remote Annex Administrator s Guide for UNIX Chapter 1 na Commands C 28 Book C ...