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Configuring and Managing Digital Line Cards
175
compression affects audio quality and bandwidth, see
“Audio
Settings”
on
page 37
.
■
Audio Source Gain — Enables you to adjust the audio gain to resolve
volume issues.
CAUTION:
Do not change your Audio Source Gain settings unless you
are instructed to do so by a technical support representative.
To modify span audio controls:
1
Click the appropriate link:
■
PSTN Gateway Configuration > IT1 Spans
■
PSTN Gateway Configuration > ISDN PRI Spans
■
PSTN Gateway Configuration > ISDN BRI Spans
2
Click the MAC address of the span you want to modify.
The number of channels supported per span depends on the
configuration of the Digital Line Card. E1 cards support 30 channels per
span.
3
Click the Audio Controls tab and see the online Help for more
information.
4
Enable the
Echo Canceller Enabled
check box if you want to turn on echo
cancellation.
There are two situations in which it might be desirable to disable echo
cancellation on a T1 Digital Line Card:
■
If a system is connected to a telephone carrier (Central Office) by a T1
Digital Line Card, and the telephone carrier guarantees to provide
echo cancellation on all channels at all times.
■
If T1 Digital Line Cards directly connect two systems, and the network
between the two is completely composed of digital circuitry, thus
eliminating sources of echo.
You can enable or disable echo cancellation for each T1 Digital Line Card.
However, you cannot enable or disable echo cancellation on individual
channels.
CAUTION:
Before you enable echo cancellation for a T1 Digital Line Card,
verify that the card is configured for DS1 operation and not ISDN PRI
operation.
5
Click
OK
.
Summary of Contents for 3C10402B
Page 18: ...18 ...
Page 22: ...22 ABOUT THIS GUIDE ...
Page 26: ...26 CHAPTER 1 INTRODUCTION ...
Page 74: ...74 CHAPTER 3 FEATURE SETTINGS ...
Page 130: ...130 CHAPTER 5 TELEPHONE CONFIGURATION ...
Page 156: ...156 CHAPTER 7 CALL DISTRIBUTION GROUPS ...
Page 194: ...194 CHAPTER 8 PSTN GATEWAY CONFIGURATION ...
Page 256: ...256 CHAPTER 10 SIP MODE OPERATIONS ...
Page 328: ...328 CHAPTER 11 DIAL PLAN ...
Page 360: ...360 CHAPTER 13 DOWNLOADS ...
Page 370: ...370 CHAPTER 14 LICENSING AND UPGRADES ...
Page 406: ...406 CHAPTER 16 NETWORK MANAGEMENT ...
Page 412: ...412 CHAPTER 17 COUNTRY SETTINGS ...
Page 450: ...450 APPENDIX A INTEGRATING THIRD PARTY MESSAGING ...
Page 456: ...456 APPENDIX B ISDN COMPLETION CAUSE CODES ...
Page 510: ...510 APPENDIX F OUTBOUND CALLER ID AND 911 SERVICE ...
Page 546: ...546 APPENDIX G NBX ENTERPRISE MIB ...
Page 566: ...566 GLOSSARY ...
Page 578: ...578 INDEX ...
Page 582: ......