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6 • DAX
Model 3120 RAS Administrators’ Reference Guide
48
Introduction
Introduction
The digital cross-connect (DAX) link allows configuration of the access servers’ digital cross-connect that man-
ages the time slots and clocking between the WAN ports.
The access server uses a single clock source for all WAN ports. Therefore, to avoid data loss caused by variations
in network timing, each access server should terminate WAN connections from a single timing provider. WAN
connections from multiple timing providers can be terminated in the access server if all the providers source
their timing from the same stratum clock or if the access server provides the network clock.
Click on
DAX
under the
Configuration Menu
to display the
DAX
main window (see figure 20).
Figure 20. DAX main window
Configuring the DAX
There are three variables to select when configuring the DAX circuit:
•
Circuit Type—Defines the overall clocking scheme for the entire access server (refer to “Circuit Type (dax-
ClockMode)”
•
Main Reference—Determines which WAN link supplies the clock for the system (refer to “Main Reference
(daxClockMainRef )” on page 49)
•
Fallback Reference—Enables the configuration of a back-up clock reference should the Main Reference fail
(refer to “Fallback Reference (daxClockFallbackRef )” on page 49)
Circuit Type (daxClockMode)
Defines the overall clocking scheme for the entire access server. For each circuit a selection must be made as to
the overall clocking scheme of the entire system. If your system has only one circuit displayed, then that circuit
must be set to Master.
The following settings are available:
•
master(1)—The master device is responsible for providing the master system clock in synchronization with
one of its references. If your access server has only one circuit, then this setting must be Master.
•
secondary(2)—The secondary circuit provides the master system clock if the master circuit fails.
•
slave(3)—Slave devices provide the system clock references for use by the master or secondary.
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Страница 8: ...Contents Model 3120 RAS Administrators Reference Guide 8...
Страница 12: ...About this guide Model 3120 RAS Administrators Reference Guide 12...
Страница 16: ...1 Introduction Model 3120 RAS Administrators Reference Guide 16 Saving HTTP HTML Object Changes...
Страница 21: ...21 Chapter 3 Import Export Chapter contents Introduction 22 Export Configuration 22 Import Configuration 24...
Страница 32: ...4 Alarms Model 3120 RAS Administrators Reference Guide 32 Modify Alarms Configuring alarm severity levels...
Страница 134: ...8 Dial Out Model 3120 RAS Administrators Reference Guide 134 An example section of dialout...
Страница 140: ...9 Callback Access Server Administrators Reference Guide 140 Dialout...
Страница 176: ...13 Filter IP Model 3120 RAS Administrators Reference Guide 176 An example of using a filter...
Страница 178: ...14 Frame Relay Model 3120 RAS Administrators Reference Guide 178 Congestion frameEnableCongestion 184...
Страница 226: ...17 MFR Version 2 Model 3120 RAS Administrators Reference Guide 226 MFR Version 2 Modify...
Страница 238: ...19 SNMP Model 3120 RAS Administrators Reference Guide 238 Out...
Страница 250: ...20 System Model 3120 RAS Administrators Reference Guide 250 System Packet Holding Message Blocks...
Страница 299: ...299 Chapter 24 About Chapter contents Introduction 300 Patton Electronics Company contact information 300...
Страница 304: ...25 License Model 3120 RAS Administrators Reference Guide 304 End User License Agreement...
Страница 309: ...309 Appendix B MIB trees Chapter contents Model 2960 MIB Tree Structure 310...