365-575-102 Operation: NTP-007
Issue 8.0, July 2002 Page 5 of 6
Figure 3 – Five Node Ring (Three Nodes with DRI Cross-Connections and Four
Drops)
In Figure 3, the topology is the same as in Figure 1 but node 2 does not have a 1-way
drop cross-connection. Applying TID rule A to all source nodes and secondary nodes
implies using the same TID as node 0 (or, equivalently, the TID of node 2) for all
cross-connections at all nodes. Application of TID rule B gives different results since
there is no longer a drop cross-connection at node 2. Following are examples:
•Atnode0:X=node 0, Y=node 2, and Z=node 1 where TID rule B.5 implies
Z=node 1 be used.
• At node 1: X=node 1, Y=node 2, Z= node 1 where TID rule B.4 implies Y=node 2
be used.
•Atnode2:X=node 2, Y=node 3, and Z=node 3 where TID rule B.5 implies
Z=node 3 be used.
• At node 3: X = node 3, Y = node 0, and Z=node 0 where TID rule B.5 implies Z
= node0beused.
• At node 4: X = node 4, Y = node 0, and Z=node 0 where TID rule B.5 implies Z
= node0beused.
node0
4a
1-way drop
1w-6 to 4a
source=node0
...
4b
node1
4a
node2
4b
node4
4a
1-way-DRI
4b to 1e-6
dest=node1
second=node0
1-way drop
1w-6 to 4a
source=node0
1-way thru
1w-6 to 1e-6
dest=node2
source=node0
1-way-DRI
4b to 1e-6
dest=node3
second=node0
1-way drop
1w-6 to 4a
source=node0
1-way drop
1w-6 to 4a
source=node0
1-way thru
1w-6 to 1e-6
dest=node0
source=node0
tpa 849526/01
node3
4a
...
4b
......
1-way-DRI
4b to 1e-6
dest=node0
second=node0
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