Ericsson LBI-39224 Manual do Utilizador descarregar pdf (Página 68)

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101

LBI-39224

3-38

1. One node in the system must be the MASTER source of

network timing. The CEC/IMC will support a primary and

redundant (or alternate) MASTER sources of timing as

indicated above.

2. A MASTER node can be defined as a site, a Jessica, a T1/E1

link, or a CEC/IMC.

3. All leased T1/E1 facilities from the telephone company are

frequency locked by the phone company. If there are any

phone company T1/E1 connections, one of the connections

must be the MASTER source of timing. Any other phone

company connections may be the redundant MASTER source

of timing. Phone company T1/E1 connections include leased

lines for sites/multinode and T1/E1 connections through an

MD110 (Jessica).

4. Any nodes using analog interfaces (including analog

connections from an MD110 to the phone company) may be

disregarded for synchronization purposes.

5. If a node is not a MASTER timing node, it must be slaved to

the T1/E1 link going towards the MASTER node.

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