9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-A-15
Circuits
The Configuration > Circuits screen supports two windows, one for Traffic
Circuits, the other for Auxiliary Circuits.
Traffic Circuits
In the Circuits window, circuits on the ring are either:
• Connected (dropped and inserted) from a ring circuit to a plug-in installed in the
node, which may be a DAC, or a RAC that is linking to/from the ring.
• Passed through the node.
A circuit connected at this node must also be connected (dropped and inserted) at
another node on the ring to complete the circuit.
Each node/node circuit on the ring is dedicated; a circuit cannot be reused to
provide connection between other nodes on the ring.
The circuit connection process involves:
1. Selecting circuits on the ring to be dropped and inserted at the node.
2. Applying port-port cross-connects between these circuits and DAC and/or
RAC plug-ins, which feed traffic to/from the ring.
3. Leaving all other ring circuits (those which are not drop-inserted at the node)
as pass-through circuits.
Key to a successful circuits configuration is a ring circuits planner, showing all
circuits on the ring, and the nodes at which they are to be dropped/inserted.
This same planner must provide circuit configuration data for each node, with
identification, by circuit number, of the circuits to be drop-inserted, or passed
through.
Information on a recommended planner is provided in Planning a Ring Network
on page A-4.
Ring-specific data for Auxiliary circuits will be included in a latter release of this
appendix. Comprehensive data on Auxiliary configuration is included in CT >
Node and Terminal Plug-ins.
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