Overhead Circuits
The Overhead Circuits subtab allows you to view information about overhead circuits on the network. Overhead circuits include DCC and IP tunnels, user data channels (UDCs), and local and express orderwire (orderwire circuits require AIC-I cards). You can also create, delete, edit, and merge overhead circuits.
 
Item
Description
Circuit Name
Name of the circuit. The circuit name can be manually assigned or automatically generated.
Type
The circuit type. See Overhead Circuit Types for circuit type descriptions.
Status
The status of the circuit. See Overhead Circuit Statuses for circuit status descriptions.
Source
The circuit source in the format: node/slot/port “port name” virtual container/tributary unit group. (The port name appears in quotes.) Node and slot always display; port “port name”/virtual container/tributary unit group might display, depending on the source card, circuit type, and whether a name is assigned to the port. If the circuit is a concatenated size (VC4-2c, VC4-4c, VC4-8c, etc.), VCs used in the circuit are indicated by an ellipsis, for example, VC4-7..9 (VCs 7, 8, and 9) or VC4-10..12 (VC 10, 11, and 12). Note the following:
 •
If the port is on an ONS 15600 SDH ASAP card, the port format is pluggable interface module (PIM)-pluggable port module (PPM)-port number.
 •
If the port is on an ONS 15454 SDH MRC-12 card, the port format is PPM-port number.
Destination
The circuit destination in same format (node/slot/port “port name”/virtual container/tributary unit group) as the circuit source.
Spans
The number of internode links that constitute the circuit. Right-clicking the column displays a shortcut menu from which you can choose to show or hide circuit span detail.
Create
Displays the Overhead Circuit Creation wizard, to create a new overhead circuit.
Edit
Displays the Edit Overhead Circuit dialog box, to edit the overhead circuit that is highlighted.
Delete
Deletes the overhead circuit that is highlighted.
Merge
Merges multiple orderwire cross-connects created in older CTC releases into one network-level CTC circuit.
Search
Displays the Circuit Name Search dialog box, to search for circuits based on circuit name.
Help
Displays context-sensitive help.

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