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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D56 Create a Unidirectional Low-Order VC3 Circuit with Multiple Drops
• Auto-ranged—Unavailable when the Number of Circuits field is 1.
• Create cross-connects only (TL1-like)—Check this check box if you want to create one or more
cross-connects to complete a signal path for TL1-generated circuits. If you check this box, low-order
tunnels and Ethergroup sources and destinations are unavailable.
• State—Choose the administrative state to apply to all of the cross-connects in a circuit:
–
Unlocked—Puts the circuit cross-connects in the Unlocked-enabled service state.
–
Locked,disabled—Puts the circuit cross-connects in the Locked-enabled,disabled service state.
Traffic is not passed on the circuit.
–
Unlocked,automaticInService—Puts the circuit cross-connects in the
Unlocked-disabled,automaticInService service state and suppresses alarms and conditions.
When the connections receive a valid signal, the service state automatically changes to
Unlocked-enabled.
–
Locked,maintenance—Puts the circuit cross-connects in the Locked-enabled,maintenance
service state. The maintenance state does not interrupt traffic flow; it suppresses alarms and
conditions and allows loopbacks to be performed on the circuit. Use Locked,maintenance for
circuit testing or to suppress circuit alarms temporarily. Change the administrative state to
Unlocked; Unlocked,automaticInService; or Locked,disabled when testing is complete. See the
“DLP-D230 Change a Circuit State” task on page 19-26.
For additional information about circuit service states, refer to the “Circuits and Tunnels” chapter
in the Cisco ONS 15454 SDH Reference Manual.
• Apply to drop ports—Check this box if you want to apply the state chosen in the State field to the
circuit source and destination ports. CTC applies the circuit state to the ports only if the circuit
bandwidth is the same as the port bandwidth or, if the port bandwidth is larger than the circuit, the
circuit must be the first circuit to use the drop port. If not, a Warning dialog box shows the ports
where the circuit state could not be applied. If the box is unchecked, CTC does not change the state
of the source and destination ports.
Note If ports managed into the Unlocked administrative state are not receiving signals, loss of
signal alarms are generated and the port service state transitions to
Unlocked-disabled,failed.
• Protected Drops—Check this box if you want the circuit routed to protect drops only, that is, to
ONS 15454 SDH cards that are in 1:1, 1:N, or 1+1 protection. If you check this box, CTC displays
only protected cards as source and destination choices.
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