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Configuring Enterprise Edge Resources 75

P0911588 Issue 01 Enterprise Edge 2.0 Programming Operations Guide

B-channel selection sequence

B-channel selection sequence lets you select either Ascending Sequential or

Descending Sequential depending on your service provider. You should choose

the opposite setting of your service provider.

If all lines for two EE-DTMs (configured as PRI) are in the same PRI pool, then

both cards must be set to use the descending B-channel selection sequence. As a

result, the service provider must use ascending sequential sequence.

The B-channel selection sequence for BRI QSIG is always set to Descending on

Enterprise Edge, so it must set to Ascending on the service provider.

Clock Source

Clock Source lets you designate which of the systems’ Digital Trunk Modules

(EE-DTMs) obtains the timing reference from the network to be used for

synchronization.

Systems with digital interfaces need to synchronize to the network in order to

function. Synchronization is done in a hierarchical way, where each device (switch)

obtains the network clock from the device above it in the synchronization hierarchy

and passes the network clock to the device below it in the synchronization

hierarchy. The synchronization levels are referred to as strata. BRI modules can

also be used for the timing reference.

Enterprise Edge systems are stratum 4E equipment and are usually used as

termination points in a network.

For each EE-DTM, choose one of the following settings:Primary, Secondary,or

Timing Master.

Primary reference

The EE-DTM obtains the timing reference from the network and the system

synchronizestoit. This is the defaultvalueforthefirstEE-DTM in Enterprise Edge.

If the system is configured with an EE-DTM (configured as PRI), the setting should

be set to Primary.

Secondary reference

The EE-DTM acts as a standby reference. If there are excessive errors on the

primary T1 reference link, or the EE-DTM designated as primary reference fails,

the second EE-DTM will obtain the timing reference from the network to be used

for system synchronization. This is the default value for the second EE-DTM in

Enterprise Edge.

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Avaya BCM 2.0 Programming Guía de usuario Pagina 75