Configuring general CS settings
304
SmartWare Software Configuration Guide
26 • CS context overview
Note
Be careful when choosing where you get your clock source, if the clock used
for packaging the ISDN voice frames is not synchronized with the remote
ISDN clock, bit errors may result (such synchronization problems would
probably cause a fax transmission to fail).
•
Two BRI ports will be needed, the first port for the ISDN phone and the second for the public ISDN net-
work (see section
“Configuring ISDN ports”
on page 308).
•
Two ISDN interfaces will be needed, each bound to a BRI port (see section
“Configuring call routing”
on
page 305)
•
An H.323 interface is required in order to use H.323 (see section
“Configuring call routing”
on page 305)
•
The call router routing tables, and the H.323 and ISDN interfaces will have to be configure to support call
routing (see section
“Configuring call routing”
on page 305).
Calls are routed from an ISDN phone with a number in the range of 1xx–5xx to the main office with a fall-
back to the PSTN. All other calls are routed from the ISDN phone to the PSTN and from the PSTN or
main office to the ISDN phone.
•
The H.323 gateway must be configured to use the G.711 codec (see section
“Configuring an H.323 VoIP
connection”
on page 308)
•
Two Ethernet ports and their corresponding IP interfaces will be needed.
You must not start to configure the CS context and its components until you have finished planning your voice
environment. The following chapters explain how to convert the planned voice environment into the Smart-
Ware CS configuration. The IP configuration is not a topic in this example. For more information on IP con-
figuration refer to chapter 9,
“IP context overview”
on page 105.
Configuring general CS settings
There are several parameters that cannot be collected into one specific configuration task, because they are
independent of the rest of the CS context configuration and apply mostly to an interface card or even to the
entire SmartNode. In most cases, the default value is acceptable, so that you do not need to perform these con-
figuration tasks:
•
Configuring the clock source
—A reference clock is needed for packaging the ISDN voice frames. The ref-
erence clock can be generated internally or obtained from an external source (e.g. public ISDN). If you do
have a connection to a public ISDN, select that as your source for the reference clock.
•
Selecting PCM law compression
—The PCM law-select specifies the voice characteristic compression
curve. Two values are possible: a-Law (used in Europe) and µ-Law (used in the USA).
Procedure:
T
o
set the general CS parameters
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Страница 553: ...553 Appendix A Terms and definitions Chapter contents Introduction 554 SmartWare architecture terms and definitions 554...
Страница 559: ...559 Appendix B Mode summary Chapter contents Introduction 560...
Страница 566: ...566 Appendix D Internetworking terms acronyms Chapter contents Abbreviations 568...
Страница 571: ...571 Appendix E Used IP ports available voice codecs Chapter contents Used IP ports 573 Available voice codecs 574...
