Avaya BCM 4.0 Networking Guide de configuration télécharger pdf (Page 111)

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Chapter 6 Configuring resources — media bay modules 111

BCM 4.0 Networking Configuration Guide

• Internal —The DTM/BRI does not obtain timing from the network, but transmits the

internally-generated system timing, which is derived from the Primary/Secondary source, to

equipment to which it is connected.

Note that while in the absence of a DTM Primary clocking source a BRI module can be used

for the primary timing reference, it is always recommended that, when possible, DTM(s) be

used as primary (and secondary) clock sources and that any remaining DTMs/BRIs be set to

Timing Master.

Timing within networks

In most T1/E1 network configurations, you need one DTM or BRI configured as Primary to act as

a primary reference and obtain clocking from the network.

The only application where you might not have a DTM/BRI designated as a primary reference is in

a private DTM/BRI network where your BCM system is connected to other equipment using

T1/E1/BRI interface(s) that require a clock source and your system is designated as the clocking

source for that private network.

• If the other switches are to be clocked to your BCM system, all your DTMs/BRIs should be

designated as Timing Master.

• If your BCM system has two DTMs, you cannot assign both DTMs as primary reference or

both DTMs as secondary reference.

You can have one Primary reference and one Secondary reference per system.

• A T1, PRI(T1), PRI(E1), or BRI can act as the clock source.

T1 interface parameters (region-specific)

The T1 Parameters details appear for module types that have been configured as T1 or PRI. It

allows you to define a number of settings that are dependent on your T1 service provider settings.

1 Click Configuration > Resources > Telephony Resources.

2 Click a T1 bus.

The T1 details panel appears. See Figure 26.

3 Configure the T1 parameters. Refer to the information in Table 21.

Warning: Changing the clock source may disconnect calls.

If you change the clock source for your system, you may cause your system DTM

interface(s) to reset, resulting in dropped calls. Choose a suitable time to change the clock

source and use the Page feature to inform users of possible service disruptions.

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