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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.